My cat has been throwing up. Kinda worried now!

So a couple hours ago (1:30ish) my Leo threw up his breakfast that he'd had about 5 hours before. I did notice a little brown leaf in it and figured that may have been the cause? Then a little later he threw up again, just slimy yellow liquid this time. I moved him to the bathroom because I didn't feel like cleaning the rug that he'd been using as his deposit pad again. Normally I wouldn't worry, but he doesn't seem his spunky self. But I guess who would if you'd thrown up twice within an hour.

Since he's been in there he's thrown up two more times, all yellow slimy, sorta white foamy stuff. SO 4 TIMES!? Could this be just something he may have eaten outside, like the leaf? I have two cats, and they're indoor, but I let them out to play for a little bit with supervision.

Should I worry? Or is it just something that needs to be out of his system? He's never thrown up this much before. 

Also, I feed them around 5 or 6. Should I not feed him, or maybe feed him a little?

I really can't afford a vet right now and would like to avoid that visit if at all possible. 

Help!! 

UPDATE: he's thrown up again. Same yellow slime with white foam on top. Fifth time.  

He seems content to just hang out in the bathroom on the towel I laid down for him, which usually he would be scratching to get out. 

You really do need to get him seen by a vet. The fact that he's continuing to vomit bile (which is what that yellow slime stuff is) is very worrying. I appreciate that money is tight for you, but this kind of thing cannot be left untreated - you need to find out what's causing all this, and the sooner, the better.

Call your vet ASAP, and get him seen today. I really hope he's ok :cross: [article="32915"][/article]