Just a question

Michaela • 26 mother of one And a part time sales advisor.
I stopped ovulating a couple of days ago did a pregnancy test yesturday 2 in fact both negative. Not really bothered as I knew they would be but this morning I thought I would take a opk test it was my last one just to see what was going on with my body. it came out positive!? Slightly confused by this I don't know what the heck my body is playing at my af days seem to be getting shorter I'm very irregular anyways could this be due to having a miscarriage in December last year? I had check ups for a month after and my eggs and overys were absolutely fine. Anyone had a similar situation this is so annoying 😅.