Period issues

I don’t even know hat to do. I had a baby 14 months ago and we started trying for baby number two two months ago. My last two cycles have been shorted than normal and now this one I’m still having bleeding. Started period 4/12 and it was gone 4/19 but then this dark brown blood is still there every time I wipe. Some days/times it’s worse then others. I started to use the clear blue digital advanced to see if I am ovulating and I go back to the doctor may 11th but I was really hoping this month was the one and now I’m worried something else is going on. I’m turning 37 this summer and we’re only trying for a little bit longer before we call it so I don’t want to delay anything but I don’t even know what to do.

I took a pregnancy test the day before my period started and it was negative. I’ve also gained weight right in my baby belly and my nipples have milky discharge 🤦🏼‍♀️