Ovulating CD5?


Hi I’m new here and TTC! I bought Premom OPKs and started testing CD3. My lines have gotten darker each day. I’ve not gotten a faint one yet. My cycle only last 4 days, yesterday was CD5 and I had a surge. My BBT was the lowest it’s been since starting that Monday as well. From 97.1 to 96.8 this morning.

Is it possible that in ovulating this soon After my period?

I appreciate all the help. This stuff is hard!