Implantation Bleeding

Hey all-

So I'm having a weird cycle! I'm approximately 8 cycles, 12 months postpartum. Previous 7 relatively normal. 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