Well, if sex could cure money and weight problems I know what we would all be doing right? Seriously the Doctor was way out of order to tell you to have sex in order to put things right. I'd love to see the evidence/research the Doctor has done that proves that sex can do these amazing things. Not only that but being forced to have sex is classed as rape when it's not consenting. So yeah, please consider seeing a proper Doctor that has been trained in psychotherapy for your issues.