Induce period

Hey guys! So I’m just trying to figure out a way that I can get my period. My periods are really irregular, the last time I had my period was April 28. So it’s been 153 days. I have gone to an OBGYN but the doctor didn’t tell me much. She wanted me to go on birth control but I don’t have sex and she warned me about mood swings weight gain, all the side affects which I don’t want to go through. I thought maybe after the age of 18 it would become regular but it hasn’t. Previous I tried vitamin c and within a few days I would get my period. So I would take vitamin c for a few days every month and my period would come. But I think my body has gotten use to it and it no longer helps. I was just trying to see if anyone one had other tips that would help me out. I would really appreciate any tips given. Thanks❤️❤️