Feeling broken

Samantha • 👨‍👩‍👧🐶💗 🤰🏻#2

9 DPO and my CM is brown I’ve started spotting and having some minor cramps. If this is my period starting this will Be the 3rd month in a row my period has gotten shorted by 3 days(29 to 26 to 23) This was our 4th month TTC #2 and I’m starting to think something is wrong. I use opks, BBT and the apps to track; I just don’t understand.