Ok so I'm new to this app and I have an 8M old going on 9M on the 12th. I had a period in January (don't know the dates bc I don't keep up) and bc I'm very forgetful and have lots on my plate, I can not remember to save my life if I started this month (February). My sister and I have about the same periods, varys from 1-3 days apart since we live together. She started but I didn't. But I can't remember if I started early this month or not. I took a test (Rexall) brand and it said negative. Should I take another one or wait it out?? HELP PLEASE!!!! 😩😩🤦🏻‍♀️