 [ Symptoms ] my doctor prescribed belviq xr20mg and phentermine15mg for weight loss [ Disease ] hi its a big question that you ask for something so simple to happen ie getting pregnant ok i think you find that you need to start by waiting and getting your periods back let them get back into a cycle for 3 months this is so things settle down and then off you go and try to start a family but be warned this could take some time like a year or more i do hope this helps in some way sometimes life is hard but try not to worry and relax and carry on enjoying life good luck