[LFC3]

I have very irregular periods and this has never happened. I get my period twice a month and they last 7-10 days the most (annoying I know). So I had my period 4/3/13 until 4/11/13 and got it again 4/23/13 until 5/1/13 and had sex 5/2/13 I have two apps one said I ovulated 4/29/13 (while I was on my period) and the other app said I was fertile 5/2/13 (the day I had sex) and ovulated 5/3/13 the day after and today is 5/6/13 and I went to pee yesterday 5/5/13 and the toilet paper had a reddish pinkish color and I have to say I'm a bit worried don't know what its suppose to mean because I just got off my period on Wednesday 5/1/13? And my next period should be around the week of 5/13/13. Could this be implantation bleeding that soon? Im 18 by the way and sexually activeand my partner and I have been together for 3 years.