Body weight

Hi everyone, I’m currently 16 y/o and i went to my psychiatrist last week and weighed myself to find out I’m 186.6 pounds (I’m 5’6) i feel like ever since I’ve been on my depression medication it’s been making me gain a lotttt of weight! Also, i work at Chipotle so of course me eating the food 3-4 times a week isn’t good for me either lol. Is there anything that i can take to help me lose weight fast ? My birthday is in June so i just want to be satisfied with the way that i look by then at least🙁.

I do drink a lot of water and sometimes Cranberry juice.