Is loosing weight the only way?

Victoria

So I had my miracle baby 3 yrs ago after several MC & I was ttc this summer but I hadn’t had a period from July 2020 till February 2021(no birth control) then I bled for 18 days straight then no period again till June 2021 I bled from June 8 till July 9 th when I finally got back on birth control my doctor said the only choice I have to regulate my period and get pregnant is loosing weight.. and that the only thing that would stop my month long bleeding would be birth control so I started it again July 9th 2021 and I just took it out again October 23rd I haven’t lost any weight but I was hoping to try again.. I’m scared I’m messing with my bodies hormones too much starting and stopping is there any natural ways to regulate my cycle?? is loosing 50 pounds my only hope? I know it would be good for me but I struggle with it so much :(