Whats wrong with my teeth?!

Whats wrong with my teeth?

my teeth feels like there is a huge pressure on them. and somethime's it really hurts and it feels like my teeth are swelling and sometime when i push up against my teeth they feel like there shifting/moving. iv'e been to the dentist they say my teeth are fine. so what could it be . fyi: this doesn't happen everyday if just happens like 6 or 7 time's a month and it really bothers me . has anyone else ever had this problem?

3 weeks ago
and i feel better when i chew on food . the pain goes away.

has your dentist xrayed recently so you know it's not an abcess or anything?

If you floss after this, does it go away? Maybe you've gotten a piece of food stuck between your teeth; that makes them feel really odd, if it's stuck in a weird spot.