Irregular periods after mc

I had a natural mc back in April at 6.5 weeks. My first cycle occurred about a month after. Second cycle was a day late, third 4 days late, and fourth 10 days late. Cycles are always light and only last about 3 days. Well I started having some brown discharge 9-22. I wasn't sure it is my period or just spitting. It has been way way light than normal and just not like usual period. I have been TTC for 3 months. I'm not sure when my regular cycle is due since I'm so irregular. Anyone else have irregular cycles after mc? I'm thinking it may be time to go to GYN