Hi I'm Dina and I'm trapped in my Fat body!

Hi there,
I had a thyroid problem ( Hypothyroid) for the past 6 years, I'm taking replacement now but before I started the pills I gained 11 Kg in one year, and since then I couldn't get rid of them... I'm only 158cm and I weigh 72 kg, I eat a lot, and I hardly exercise, I've got 2 kids and I'm 10 weeks pregnant now, I know some would tell me it's not healthy to lose weight while pregnant but I'm so stressed because of my weight, I was 68kg 10 weeks ago and now with my new weight gain my knees hurt, I limp when I walk, I can't breath while sleeping and I have to sleep almost sitting, I have a very small body frame and it's stuffed with fat, I can't sit still on my sofa as I feel bloated and my feet are swollen most of the time, I think if I don't lose some weight during my pregnancy I'll end up on a wheel chair! I need help and support and I know with some encouragement I'll be able to do some life changes...
Thanks for reading me...