Hi, I just registered on this site today and have enjoyed reading the threads. I don't know why you were feeling poorly, but am glad to hear you are feeling better.
The mood swing thing with your significant other sounds like our house. I think it's a "40's" thing with males. I am 7 years older than my husband and have had no problem with the age thing - he seems to be having a terrible time. When our daughter turned 20, he had a miserable day - I guess he realized he was getting older or something.
When he's having a "bad" day, I just smile and say "yes, dear". This has been going on for about 1 and 1/2 years. I hope he gets over it soon! I'm tired of saying "yes, dear". Ah, well, in all other respects he's a great guy, so I guess I shouldn't complain too much.
Good luck with yours!