3 days late could I be pregnant?

Hi Im 28 years old I had unprotected sex with my boyfriend 1 day before I got my period. this was last month on the 24 started my period on the 25 .. this month Ive been feeling a slight dizziness Im 3 days late I have cramping but no period.. about a week and a half ago I had a very bad pelvic pain that lasted 2 days I was concerned.. It went away but now Im very anxious to know but is it to early? about 3 months ago I had irregular bleeding that lasted two days it happened twice for two months I thought it was implantation bleeding but it turned out I was not pregnant both times.. but now I concerned about this I reall yhope Iam this time... I was on the depo for 2 years about 5 years ago and I feel it completely messed me up..I hate that drug!!.. fingers crossed that im finally pregnant!!