Can a Peak happen on the first day off your period ???

Hello ladies,

I have a question. So since I inseminated for the first time last month and didn’t get pregnant. My period cycle lasted 31 days (never happens) and made this cycle off. I just ended my period 3 days ago. The first day of my period being off I tested the LH strip and a peak pop up. The second day of being off my LH drop drastically and today it went up a little bit. Is this suppose to happen. Did i actually ovulate that soon?