OBESE?! & doctors. Help..

Is anyone else scared to go to the doctor? I'm terrified. I'm 5'4" 255lbs and 20 years old. Ive been struggling with AF since I was 12 and I want to look for answers but the last time I was at the doctor the old, male, midwife basically said I was too fat and said I needed to loose weight for my period to get normal. I was in tears by the time he called me overweight/obese and I ran out of the room, and cried my eyes out. This was when I was 17. I'm 20 years old now and I'm scared that I will get no where by going to the Dr. Like they will take one look at me and say you're too fat, I have been recently to get birth control but I cheated the scale and held the wall to make it seem like I was 225 instead of 255. The doctor didn't mention my weight, just my concern of high blood pressure. So she switched my BC to a progesterone only pill. But its been two months and its still high. It worries me. I have lost weight, 3 pounds this week. So I am trying. Its just discouraging. Any advice??