What could be causing hair fall after weight loss?

Hi doctor,

I am a 21-year-old female. I started gym to lose weight. After 10 months I lost around 26.46 Ibs and after 6 months into the gym, my hair started shedding vigorously. Also, I had a lot of dandruff. After 10 months I took some diet pills to lose the last few pounds. I also underwent a stressful time recently when I was undergoing a breakup. I have lost around 60 % of my hair volume and it is really making me cry so bad. The thinning is happening on the front, center, and sides of the head. I had really long and thick hair earlier. Please help me. What condition am I going through? I researched a lot and I thought maybe it was telogen effluvium. I tried Minoxidil but it started causing dark circles and wrinkles on my skin. I am currently taking biotin supplements and having a healthy diet. I just want to know a natural cure. Please help.