I'm confused

Desiree

I'm a mom of three kids. My youngest is 6 and a half months and I think I'm pregnant again. We weren't trying and I haven't had a period yet. I got two very light positives yesterday that weren't fmu. I took one this morning that I thought for sure would be darker. It looked stark negative. Then at around 1:30 I took another that has a light positive. Has this happened to anyone else before?