One day period???? Positive ovulation 13 days later and now faint positive pregnancy test

Okay so I have a one day period this past month which was odd. Usually they are 3 full days and the first day is very heavy. This time it was one day and only brown blood all day. So if that was my period I am in day 15 of my cycle. I got a very positive ovulation test on Sunday . But then I took this pregnancy test today because I just felt off. I’m wondering if it’s just the dye. I’m confused bc I have had some pain in left ovary when my period was due last time. Not sure what to think. Helppppppp