Hello girls, I have a problem. For three months now, in the middle of ...

Hello girls, I have a problem. For three months now, in the middle of my cycle, there's spotting at first brown discharge and then blood. It just spots! In the first month, I went for an ultrasound thinking the coil shifted. The ultrasound showed everything was fine and it wasn't menstruation, maybe stress said the doctor. But this is already stressful, every month for a week in the middle of the cycle it spots. I'm going to see a gynecologist soon, as I can't leave children with anyone right now. I think it could be hormonal imbalance? Has anyone ever experienced this?