TSH increase. Food to be avoided?

Hi . we are planning to try by August. I recently had chickenpox around May, and wanted to wait for 3 months to recover completely and start trying. I had my blood work done, my T3 and T4 are normal, but TSH is 9.5. I previously suffered a MC (miscarriage) last august, my TSH was around 4.5 during pregnancy and I was taking thyronorm. After MC,in blood work TSH was 4.2, since it was normal I was asked to stop my medication. I had increased hunger last month, after my pox, and couldn't really control my intake, moreover I cudnt exercise much as I felt tireing and had no access to go on for a walk due to severe lockdown measures in my area, I put around 5 kgs in a single month. Is the TSh high because of the sudden weight gain? Should I wait till levels are normal and start trying? Or can medicines help if I fall pregnant. I am making sure now to exercise everyday and eat accordingly. Any specific food to be avoided? Really confused, please help.