So confused

My Husband and I have been TTC for about 20 months now.. We BD on Sunday 03/05 and after we finished I noticed I was bleeding.. light pink blood and it only lasted a few hours.. I thought maybe it could be ovulation bleeding?.. I read somewhere that this type of bleeding usually occurs after you have ovulated.. now on Thursday 07/05 I am bleeding AGAIN.. we have not done anything since Sunday because I was a bit mortified but this time it is brownish / pink blood not enough to need to wear a liner or anything, only shows when I wipe.. could this be implantation?.

My last 2 cycles were 38 and 41 days and I have never had a cycle less then 30 days so it seems WAY to early to be my period... no other symptoms besides horrible gas and bleeding.

Has anyone else experienced this?