Implantation?

I am on cd23, my cycles are all over the board but are usually on the longer side 37+ . I had gotten a positive opk on 4/9. Yesterday I had quite a bit of water cm and then right before I went to bed I noticed a little bit of brown discharge in my underwear. This morning I pushed a little bit of toilet paper inside to check if it was still brown and there was a little bit of reddish mixed with cm. I feel like this is too early to have this already if I only had a +opk 5 days ago. What do you ladies think?