vagina soreness. please advise.

i gave birth nine months ago and just got my period since i got

pregnant (that was a good year and a half without it!!!). a week

ago, i had sex 3 days in a row where i was on top and trying

different movements. my vagina (whole entire area) was sore and

itchy (it felt good to itch but hury to touch the area) and i

just figured it was raw for too much sex. (im only having sex

with my hubby so it shouldnt be an infection or std or anything.)

then tuesday i got really crampy and started to bleed so im

assuming i have my period. but my vagina BURNS like never

before. the whole thing feels like its on fire and it REALLY

hurts to pee. is this normal??? please help!!!!