My weight loss journey

I have a roller coaster challenges with my weight gain and loss cycle since the past 5 years. Currently overweight (BMI more than 25), and need to urgently loose weight due to my knee problems. It all started when I completed my master degree. The transition of being an MO to clinical specialist saw me gaining an exorbitant amount of 10 kg! This was mainly due to reduce activities associated with being a specialist (I do not need to run around the hospital during on call), and reducing BMR associated with increasing age. I was still complacent at that time, as my BMI is still within normal limit. But all went to ashes when I started my PhD degree. Sitting infront of computers for hours didn't help me to burn calories. In addition to food binge associated with stress and reducing BMR associated with age, saw me increased another 10 kg! Then, I started to have knee pain. My knee couldn't hold my weight anymore. I couldn't continue on like this, or else I will need a TKR in 10 years time. From then on started my roller coaster journey of weight loss. My first experience of weight loss attempt saw me consuming protein shakes. I also enrolled myself into swimming classes 3x per week, and enroute to class, I need to cycle for 5 km to and fro the swimming class. I was happy when I started to loose weight, initially 10kg loss & everybody was commenting how good I look. But then, the weight loss becomes a bit drastic, I lost another 7 kg in a matter of few months (total loss 17kg), and I started to have symptoms of tachycardia, loose stool, heat intolerance etc that prompt me to believe that I have hyperthyroidism. And true to my suspicion, I did have hyperthyroidism with thyroid level almost 3 times normal. Due to this, I need to take medication to control my symptoms. And true to my expectation, as soon as my thyroid level normalises, I started to gain weight. And the fact that I have food binge for a few months after being back in Malaysia didn't help. My weight increased to beyond overweight, and my knee pain started again.