Can the medication cause weight gain

I am having an appointment with my psychiatrist this afternoon and I am obsessing about what to do with my medication. I think it’s also very ocd like obsessing. I am currently on 30mg mirtazapine. Ive been on this for years (because of insomnia, anxiety and depression) (15mg) and after we tried to switch to another (amitryptiline) because of nerve pain, I went down the road of insomnia and later on ocd again. So I am back on mirtazapine, and weaning off of the amitryptiline. This is/was a very traumatic experience. Because the switch caused a mental breakdown. Now my psychiatrist has mentioned to up the mirtazapine to 45mg. And my obsessive self has done a lot of research and a lot is saying that the higher the dose, the more you can experience anxiety. And for ocd it’s obviously not the first choice. I am obsessing all morning about it. I am too scared to go up. But I am also too scared to try another and to wean myself of off mirtazapine. I feel stuck at this point. Taking two meds is also not something I want. I could really use some words of encouragement right now I think. 🥹

Can people please share their experiences on very low dose medications for their OCD? Maybe ones that have worked well with little side effects? Anything is helpful & thank you

Hi hi, my therapist recommended i look into medication options to help with my treatment. i want to try meds, but im a little weary after an evil zoloft experience,, though that could just be that zoloft is generally evil lol. what are your guy’s experiences (good or bad) w meds/what did you take? i know they aren’t a sole solution but im looking for all the help i can get. thank you!!!