Thyroid woes again

I had a 3-month recheck of my levels earlier this month. My TSH is still too low, from my having been on way too high a T3 dose for a month or two, so my doc said to drop from 4x5mcg T3 per day to 3x5mcg. Starting about a week after decreasing the dose, I started to get more migraine-like symptoms and tinnitus. I got to a point where I couldn't stand it anymore, so I took 4x5 mcg one day. Unsurprisingly, I felt much better that day. (I've been tracking symptoms in the "mini diary" tool on my phone.)

Yesterday I did that again, and felt great. Today, there's massive sinus pressure and tinnitus making me want to stab my eardrums out.

I'd like to see my TSH in the normal range, but I hate feeling like this.

My T4 is borderline low, though, so maybe I could go up on my Synthroid and stay on 15 mcg of the T3. I should call my doctor's office, I guess. She wanted me to do another recheck in 8 weeks (so, the first week of October), but I'm not sure I can make it that long.