Miscarriage with twins. Reoccur again.

Hi, I am 28 year old . I was diagnosed with endometriosis cyst and was operated on 21st Feb 2016..I conceived soon after that in May with twins naturally later I had miscarriage on 15th August. During my 16 weeks of pregnancy I had some bleeding and during 8th week I had clot near one sac which dissolved ..but water level in one sac reduced completely and one of the foetus heart beats stopped working in 13 week and the other foetus growth was completely fine however suddenly water level in other sac also reduced and I had miscarriage on 15th August 2016...I did histopath report and all is ok in report.. I want to conceive again please advise when is the right time ... I had endometriosis operation so just worried it should not reoccur again...