Short Girl with a Tall Obstacle

I've used the myfitnesspal app off and on for over a year, but really started using the app almost daily without quitting since the first week of this year. I have always been on the chubby side, but usually was on the "pleasantly plump" end of the spectrum. I wasn't motivated to lose weight at all. But, then my mom had 3 heart attacks within 9 months of each other. She had always been really skinny, so I'd always thought she was healthy. Wrong. She ate like a suicidal lumberjack, but had a high heart rate so her calories burned right off. I ate very similarly and got all the way up to 226 lbs by the time she had her third heart attack. Turns out that I have the same heart rate issue, but I'm still able to pack on the pounds. I'm 5'0".......I can't be 226 lbs. That looks like what 300 lbs would look like on most women. I could barely get around at all and I was MISERABLE. So, I cut out all drinks but water and almond milk. I don't have any caffeinated drinks anymore (bad for my heart rate) and I even became a Vegetarian (not a lecture...it just worked for my body to replace meat with vegetables ---not carbs). Yesterday, I weighed myself and was down to 199 lbs. This was great news to me! 27 lbs in 13 weeks. But, I still have 74 lbs before I'm at a healthy BMI. My friend Penny427 is someone I've known for a long time and I noticed how much she was enjoying using the community here, and I realized how much I wanted that. So, here I am!