has anyone tried functional medicine? I have tried acupuncture and homeopathy but nothing worked. I am desperate

I had a natural and regular period up to 2013 when I was 21 and the dermatologist prescribed me OC and cyproterone to help with my very oily hair. I decided to quit birth control in September 2021 but I did not get a period back for 6 months so I went back to birth control for a couple of months and since then I was on and off (I take OC 4 months per year just to have a fake cycle). The only time I got a natural period was this January 2024. This was my first natural period since 2015. I feel desperate at this point as since quitting OC i have tried acupuncture, homeopathy and nothing worked. All my labs are normal but I have very low estrogen. I have also upped my calories to 1500cals per day for a year now. I am 1,63cm and 53kilos and to be honest the last 10 years I have been living on a 1300cals a day diet as I thought that i do not deserve more food and I will gain weight if I eat more. I used to be 49kgs but since quitting OC i have gained weight 🥺. So 1500cals a day is a huge achievement for me mentally. I am short so I really think I do not need more food. I don’t know what else to try so I thought about functional nutrition and I needed an opinion on this. Anyone has any suggestions for my case?I would really like to have kids soon.