miscarriage at 6 weeks💔

So we miscarried at 6 weeks Have gotten bllodwork HCG levels down to 0 But my dr tells me to wait 3 months b4 trying again im soo exhausted and heartbroken and very confused some people tell me to go ahead and try again after first menstrual cycle i really dnt know what to believe anymore!!Any advice is more than welcone💔😭