I was on birth control for 7 years.

I was on birth control for the past 7 years. 3 years on the depot shot, and 4 years on IUD. Before using birth control, I've always had a normal 6 days period. On February 8th, I decided to take my IUD out since my husband and I have been having baby fever for the past two years. On Feb 16th, I started spotting, 17th, I notice a regular flow which made me really happy. But after the 19th, my period stopped. Then yesterday, my Clear Blue ovulation test showed a flashing 🙂. Is it normal to ovula this quick, or is my test stick broken? Thank you!