Hair loss is a symptom of hypothyroidism. What are your actual thyroid hormone levels? You should be getting tested for Free T3 and Free T4, every time you have TSH.
The whole idea of taking replacement hormones is to bring your levels into the normal range. You don't stop taking med, when they get there, or they go back out of range. Additionally, just being "in range" isn't good enough. You have to be a point that's good for you. Most of us feel best with FT4 about mid range and FT3 in the upper half to upper third of its range.
Please post any thyroid related tests you've had recently, so we can better assess your testing/treatment.
Do you have Hashimoto's thyroiditis?