Hi Masha, if you haven't already seen it, here is an article about weight changes. What you're experiencing is pretty common.
https://taper.community/resources/blog/weight-changes-during-psych-med-withdrawal
Are you dealing with nausea too?
https://taper.community/thread/230a8c26-1cbb-41b8-806f-da294f25ed11Venlafaxine (tapering) - Current dose 16.64 mg
Trazodone - 50 mg
Synthroid - 25 mcg
“Your brain and body know how to heal. Trust the process and keep going.”
Please Note: I am not a healthcare professional. Any advice given is based on personal experience and that of others in the lay withdrawal community.