Temper tantrums - oh my!

Eddie's last post was pretty accurate.  Lately Jack has been entering the world of temper tantrums.  It's very, very trying to deal with.  It would be so nice if Jack could just tell us what was bothering him, and why he is acting how he is; but he can't.  A week or so ago, we found ourselves smack dab in the middle of molar-itis.  I think, for the most part, we're past that.  One of his molars has now started cutting through, with a second pretty close.  He's been sleeping better and eating better, which makes life so much easier.  The last day or two however, he seems to be reverting back to the non-eating, temper tantrum throwing, miserableness that was two weeks ago.  His BM issues have been more pronounced lately it seems.  He just has the worse time trying to go, which I think just makes him feel like crap.  When we took him off of formula shortly after his first birthday, things improved drastically, and I thought that all of our troubles in the BM area were behind us.  Not quite so :( I'm not sure if it's diet related?  Or if it's just something that he will grow out of?  I just know that I don't want to have to depend on giving him prune juice every time he has trouble going.  We'll have to talk to his Dr. at his 15 month appointment in a few weeks, and see if there is anything else we can do or try.  I hate seeing my lil guy miserable all the time.