Positive ovulation after ovulation date

So I ovulated on 1/5 or 1/6 (according to my app and my symptoms) I did not use ovulation tests, but I could tell I was ovulating at that time. My husband and I did the dirty both days and a few days before 1/5.

A week later, I did some googling and read if you get a positive ovulation test after ovulating it could be a positive pregnancy test.... so I took an ovulation test and it was positive, like two pretty dark lines that looked the same. Well I took another ovulation test today (just cause I had it and I’m curious) and it was negative, not even a faint line.

I’m due for my period on 1/21, but I have been having a lot of “stretching” pain in my lower abdomen, feeling “full”, heartburn, sore boobs and nipples, and I’m SO tired.

Could I be pregnant? Was that test right?