Cycles after D&C

🌈 Jennifer 🌈 • Blessed with a 3yo girl born 9/12. Missed miscarriage 4/15 & blighted ovum 10/15. Waiting on our rainbow due 9/16.
I had a D&C on May 1st this year after a missed miscarriage. My period returned on June first and has been extremely heavy, painful and very unpredictable since. 
I'm tracking and took ovulation tests this month and I had 3 positives. But my period just came 4 days early which is a 25 day cycle. The prior month it was 31 days. 
I'm so frustrated and just wondering what others experiences have been and how long until your cycles seemed to go back to normal. 
I'm TTC and this is so frustrating.