2 day “period” 1 day spotting?

This will prolly sound pretty stupid so dont come for me please. But, I started a very light period on the 2nd of March. which was a day early according to both apps i currently have. then yesterday (the 4th) I was very very light just spotting very little. the two days I was bleeding it wasnt even enough to fill a tampon. I last had sex the 17th of February. This app states I ovulated the 19th. the other which i have used longer, says i ovulated the 17th when i had sex... my period just doesnt do this i have long ones w bad cramping and all. so confused... and my stomach is bloated like when i was pregnant with my daughter 😫 pls i feel crazy help!!