too many fvrcp boosters given??

Hi, I'm new to the site, so thankful to find a place to learn more about my brand new kitten, first cat ever . I've had him 5 wks and love him dearly. Briefly, b/c I def want this one point answered, and I'll start another thread to ask the other question I have later:  is it dangerous for my little guy to have 4 fvrcp shots? I am reading differing info online! Some articles say it should only be a series of 3 shots, then given annually. Others say boosters every 3-4 wks until 4 months of age, is that no matter when the vaccine schedule started?...help! My male kitten is 14 wks old. When I adopted him from the spca they gave me a very detailed health history. He had his initial fvrcp shot at about 5 wks old, the 2nd shot at 8 wks old, (I adopted him when he was 9 wks old) and they advised me to get him a booster at 11 wks old, which I did. Then I received a reminder in the mail from the private vet clinic that I took him to that he needed ANOTHER booster, so I diligently took him in for that, since I needed to go in for his monthly Revolution treatment anyway. He seemed ok when we left vet, but now he is super tired, lethargic, and depressed/mopey! It is stressing me out!! He stares off into space sometimes if he's not sleeping and curls his paws underneath him and lays all curled up. He NEVER has done that since I've gotten him. He always splays himself out all relaxed-like when he's tired. Was this 4th shot bad for him?? Did the vet administer it incorrectly? She had all the paperwork from the spca in there from when I brought him in the last time, I know they photocopied it for their file. Isn't it her job to be on top of how many he's had?

* I should also state that I had made the vet appt not only for the fvrcp (which the vet clinic told me I was due for) and the Revolution treatment, but I had brought Boone in because he had what I thought was anal prolapse (a red, raw-looking anus after defecating, but which eventually subsides after a few hours) and because he had seemed to urinate in the box somewhat frequently (7-8x/day). The pee also looked a bit thicker than normal, not a lot, but a little. So I wanted that all checked out. The vet took a urine sample and said he might have a "urine infection" and said his butt looked "irritated", and she said not anal prolapse. But she wanted a stool sample and said they analyze both the stool and urine to check for parasites/infection. I said, then shouldn't we wait for test results and not give fvrcp today? And she said, it's fine, and ordered a vet tech to administer the booster. What with Boone being so sickly, lethargic and sad, I am really worrying. While I've been waiting for any kind replies from anyone out there, I did more research online and it says the fvrcp should only be given "to healthy animals"!! Uh, my kitten is not healthy if the vet is testing for things which are causing anal irritation and a bladder infection, right?? I am incredibly stressed out and wondering if the stupid vet did more damage than good Boone is so mournful and sad looking. Just stares up at me and sighs.....

** Thank you for any and all input!! Sleepless mom to new kitten here ...completely worried. Just a last footnote, Boone was perfectly full of bounce and vigor prior to the vet visit yesterday. Just had that troubling red, raw anus (which I was wiping after he pooped and which seemed to help it subside back "inside" more quickly, and then the frequent peeing issue. (And yes, he had been straining to poop about a week/week and a half ago and I started adding pumpkin to his wet-only diet and that helped with straining A LOT.

There is a series for kittens and then the booster 1 year later.  Now the recommendation is every 3 years after the 1 year shot for indoor kitties though some people with indoor kitties don't vaccinate again after the one year booster.  The reason for the series is that kittens have some leftover immunity from the mother, not enough to protect completely against panleuk but enough to interfere with the vaccine stimulating full immunity.

One of my kittens had a series of 4 shots, though that should be a special circumstance.  She was in a rescue environment with other kittens at a very young age so the series was started earlier than normal.  The vet I took her too after adoption went ahead and followed the normal schedule and gave her 3 shots.  It was kind of funny I don't think the vet tech agreed with her on the fourth shot but I did what the vet said to do.