I think it's known as a "growth spurt".
I'm not sure where I read it - but someone printed all the "troublesome" months... you could maybe do a search for growth spurt on bellybelly and see if you can find anything?

Do you post in your "belly Belly" buddies who have babies born in the same month?
If not, you might want to check it out and see if other babies are going through the same things...

My baby is 7 months old... and is still waiting for his first tooth... although he chewed and dribbled non-stop from 3 months. Every day I thought a tooth would pop through! And he didn't sleep well for his first 6 months. So I can't be much help personally.

Another help might be the book: "what to expect...in their first year". This book has been really helpful for me because it's so big, and the index is great when there are specific things you want to look up. It also does month-by-month analysis so you know what to expect in advance.

good luck. Don't stress too much.