Short cycle premenopausal or pregnant

Danielle

Hey ladies my cycle is 26 days. After I had chemo, my cycles went from 28 to 26 days. Any who I had what I thought was my cycle on 1/4 but it was rusty brown and very scant. I also had brown spotting the day before that lasted for a few hours. I’m not sure what to think and I don’t want to run to the doctor. I forgot to add that I’m 32 years old married with one child. I’m not sure if it’s pregnancy because of fertility issues. Any ideas anyone? Could it be implantation, short cycle, or am I just losing my fertility now.