Periods related question. Pls help.

Hi doctors Me and my gf had little initimate moments on dec 5th 2018.NO INTERCOURSE between us I oly fingered her but there was a bit of sperms on my finger after i removed condom. She had to get periods on dec 26th she din get it. So we did urine test It can negative on 1st day of missed period. Theb again after 10 days frm.missed period we did urine test it came negative.So she took primolut.N tablet for withdrawal bleeding in january. After 4 nights of takin tablet next day we did urine test and the tester showed Very slight line on positive side.but the same Night she got her withdrawal bleeding completly.To be on safer side she took abortion pills too in january. 4 weeks after takin pills we diD urine test and it showed negative. In february she got regular periods and it was full normal flow.for confimation we did upt after her periods ended It showed negative Nw march 28 she had to get periods She still din get doctor.in february she got regular menses. Pls help.