Has this happened to anyone else??

I started back on bcp after 2 losses. We just need some time to recover. I've been taking it about a week and, out of curiosity, decided to take an opk to make sure it's keeping me from ovulating. Lo and behold, I got a positive? Anyone know what's going on here? I know we always have LH in our systems but this was a positive like the ones I successfuly got pregnant with so im slightly concerned. Help!!