Help !?!?!

Corday

I recently to the first pregnancy test January 25th & the second one I took the same day but at a later time. I also took another digital pregnancy test January 28th & it said pregnant as well. I ended up going in & taking a pee test as well as a blood test & they both came out negative. I have still been testing & have had another positive ( that’s not pictured) but I am very lost on what to do. I gave birth to my son March 19, 2018. Since find out I was pregnant in 2017 I haven’t had my period since then. January 10th to January 14th I had spotting, I thought it was my period but now I’m starting to believe it wasn’t. Anyone have in advice on what I should do.