Help me!

Savanah • Placed my son for adoption 5 years ago(single mom)...Miscarried 4 little angels... Finally got our rainbow baby boy whose 10 months old...Trying for another baby or multiples!
My husband and I have been TTC for a while now! We have had 3 miscarriages in a row, I ended up having surgery to remove a polyp/cyst thing that was the size of my fist it was very big. After the surgery we have done 3 rounds of clomid and nothing! Any suggestions as to things I can do to help us better our chances at getting pregnant?