My jaw is killing me!! What could it be??!!?

I woke up this morn & felt fine - but around 8am or so my right jaw bone started aching. I didn't think too much of it -- cause my left glands were swollen a couple days ago cause i have had an on going cold for about week & 1/2 now. I am not as sick as i was -- i still hafta blow my nose tho. I thought maybe i had a small sinus infection & then yesterday my left side quit hurting. It is a different hurt tho - not like the gland is swollen like my jaw is KILLING me! It is making my upper teeth hurt & givin me a slight headache. I have a tooth on my right bottom that is pretty bad & need to get it fixed -- but now i am 2.5 months preggo & will hafta wait until i have the baby to get it fixed! So i'm not sure what is making my jaw hurt sooo bad. I used to grind my teeth when i would sleep a few yrs ago -- but NEVER did my jaw feel like this - so i now i can prolly throw that out. Also if i bend over -- the pain increases. Any help would be GREATLY appreciated! Thanx A Bunch!!