Positive opk

Merrica
So my husband and I decided to start ttc a few weeks ago. I was on the pill for over 6 yrs so when I stopped them I wasn't sure how my body would act. Well two days after being off the pill ( in the 2nd week of the pack) I had 3 days of bleeding. I was a little confused but didn't really think any thing of it. Just thought it was a withdraw. Well I was expecting AF this week but also knew it might not happen. Randomly I took an opk yesterday and it came back positive. Took another one this morning and still positive, so I guess i am going to take advantage of it. Why not, right?