I'm fat.

eLLee • Emilee. 25. Married. TTC #1. Follow my infertility journey on YouTube down below!
I'm fat. Lol 
I used to be 120 pounds before I met my fiancé. 
Now since we moved out, I weigh 170. I gained 50 pounds! I have stretch marks everywhere and I just hate the way I am. I feel disgusting and my fiancé keeps telling me I'm beautiful and that I look the same. Which isn't helping me at all. Lol 
Any good diets and exercises that don't cost me a lot of money? Please don't mention "it works!" Because plot twist: it doesn't work for me.