I want another baby

Trying for baby #3 maybe trying to hard first 2 where unplanned blessings I love being prego and like 5 of my friends r prego maybe I just have baby fever lol Haven't had my period in 92 days pretty sure I have PCOS I'm 298 lbs my doctor told me to try n loose some weight n I probly get prego again but it's hard to loose weight ne suggestions I have cut out pop completely