I am 10 days late on my period...am I pregnant?

I should have started my period on June 5th and still I haven't. I'm usually almost right on. as of today I'm 10 days late. My fiance and I have always had unprotected sex and have been hoping for me to get pregnant. he keeps urging me to go buy the urine pregnancy tests, but I don't want to get let down yet another time and learn I am not pregnant. I have been having alot of cramps, I've been feeling dizzy sometimes, nauseated often, moody, and just generally feel different. I don't know if it is too soon to get a pregnancy test, I really really hope I am pregnant :)...does it sound like I'm pregnant, should I go ahead and get it, is it too soon to tell?