Please Am Pregnant N I Think It 5weeks... Am A

Please am pregnant n I think it 5weeks... am a student....and I don't need a baby now so I want to abort it.... can I use menstrogen in aborting or can u prescribe any medicine for me that won't hurt my womb am 19years...I didn't have sex with the man but he brushed his penis with my vagina and left his sperm all over my vagina some entered me and that's what caused my pregnancy am a virgin