trying to get pregnant I have lost a set of twins and one single last year 2 doctors have said I had to wait to lose 2…

trying to get pregnant I have lost a set of twins and one single last year 2 doctors have said I had to wait to lose 2 more and it's been about 5 months since my last miscarriage and we have officially started again in December and before that since December of 2014 what can I do to get pregnant again?