Hypothyroidism After Using Tiromel

Hi 30yo male, 186cm, 85kg. Training naturally for 2 years but moved into steroids last year.

My cycle has been on and off for 1 year now, mainly test/tren/masteron.

I’m currently bridging on test at 150g per week.

I started taking T3 tiromel at 25mcg per day back in March, and have continued with this same dose for the last 7 months.

Just had a full blood test and the steroids seem to not have affected me, but my thyroid is totally out of line.

I have low T4 and low TSH.

What can I do? Thanks for any advise