Thanks for your query,
Before treatment you need to get a proper diagnosis.
Get your hormonal
profile done with USG to look for endometrial thickness.
Your treatment options depends upon your willingness to get pregnant again.
If you are willing to conceive again , following is the treatment of choice.
1.Dilatation and curettage
(D&C) followed by oral progesterone
supplementation from next cycle.
2. Other option would be to use Levonorgesterol containing IUCD.
Hope this helps,