My gf had medical abortion on 17 march after one week we have taken scan all came normal on 27 of march[semi protected sex] we have sex.so she take. Ipill on 28 march.then she started bleeding on 4th april(not heavy as periods but not spotting she has flow but silghts ligher than normal period) she bleeded for 4 days on fifth day bleeding stop. We tought it is implantation bleeding i have done home pregnancy test on 5,7,9,10 april they all came nagative. Is it periods or withdrawal bleeding or any chances of pregnancy When can we expert her next period please answer me please