Unprotected sex 4 da past 2weeks

hi I need ans quick im having a problem ok me and mii boyfriend was havin unprotected sex 4 da past 2weeks ok my period usely cum on round da 20's of each month so we been having sex and he may injected an me but im nt sure if iam prego den he told me...

did and my period didnt cum on time it was late it excatly came on in the frist of da month it was heavy ... den we had unprotected sex again the fallin week and he injected and me I felt it so I thought I was prego my period aint cum on time again he came on th frist of da month late again im confused because ie seemz as if my period switch on me.. my period usely last 6 to7 dayz but itz now 3 to 4 days help I eat a lot my stomach rock hard and round I don't pee as much I dont think so I get major headachz and I feel like throwin up but I dont I get dizzy at times and my smell has became great sum times I cant smell certain things it feel like im throw up I need help quick I wanna know can I be prego and still be havin my period...