AiC levels

Hi I am 34f currently on Prozac and nortryptaline, txa for extreme menstrual bleeding. I have never been able to lose weight my entire life . I’ve tried dieting, constant exercise, etc all the under the care of multiple doctors. I had one doctor give me thyroid support when I was 19 and a warning about becoming pre diabetic. I took the meds and was never able to lose anything. Later on I was diagnosed with estrogen dominant PCOS and told again that losing weight was super urgent when I was 27. Agian I followed all the dietary restrictions and exercise and nothing happened. This all brings me to last year my aic level tested at 5.2. This doctor warned me again about being pre diabetic but offered no advice or guidelines. On my own I started cutting down on sugars, working out more, cutting calories all the across the board, etc. I have the same job I’ve had for two years which is restaurant shifts up to 11 hrs long. My step tracker has me at 10k-14k steps each work day. I work 5-7 days a week. The only other thing that’s different this time around is I’ve had constant bleeding issues-think 10.5 month long heavy period and clots the size of large potatoes. One of them tore my merina iud out. I’ve had two IV infusions and regularly take iron pills. I just checked last week and I’ve lost 20lbs. I had my aic tested again on Monday and it’s up to 5.3-how is this possible with all the healthy changes I’ve made? What else can I do to manage this?