On the 24/03 I had my last period which was earlier than it should have been and it lasted for 6 days, me and my oh had sex on the 29/03 then again on the 4/4. On the 4th I would have been ovulating but I had bled some red/pink blood during intercourse, it stopped the next day. Now I've just gone to the toilet and wiped and seen a slight bit of pink on the ppaer, could this be implantation bleeding by any chance? 