Implantation Bleeding?

Hey all--

So I'm having the weirdest cycle of my life! Hubby and I are TTC baby 2. I'm one year post-partum, probably 8th cycle. All has been as normal as ever for the previous 7. So this cycle I had some light spotting around CD 30 that i thought might be the start of AF but no go. So I kept taking opks and finally 3 positives CD 37,38,39. It's the Clear blue Advanced smileys so I'm sure they were all positive. Hubby and I definitely hit it! That was 5 days ago. Suddenly tonight I'm bleeding. Not heavy, so far it's just on TP but it's a lot on the tp! I don't know wtf to think! Were my opks crazy and this is probably AF starting. Could this be implantation bleeding? I feel like 5 days is a little early but not impossible. Ugh. This whole cycle has been crazy!

I didn't have IB with my first babe. We tried 2.5 years and had to have meds which I'm in communication with my doc about getting but haven't started yet so I just don't even know what to think! Alternatives welcome!