Birth control

I got on birth control (depo shot) 6 weeks pp. we waited a week to have sex. I had a period like this.....

First pp period right after getting the shot. Got it in the 15th.

** Second picture** > now I’m having mostly brown blood but it’s very little amounts. Doesn’t even really get in my pad but sometimes a tiny bit does. Like every other night. Like 1 or 2 days I’ve had a tiny bit of red. But not much.

Is this normal??? Also I’ve been having suuuppoeerrrrr bad acid reflux and weird cravings and mood swings like crazy. (Thought it was just me being super annoyed with the on and off period thing) Is this bleeding, cravings, mood swings, and acid reflux the birth control or could there be a chance I’m pregnant again?? 🤦🏼‍♀️ I’m almost 4 months pp. acid reflux is killing me anytime I eat anything 🤦🏼‍♀️🤦🏼‍♀️