Hi Kavya,
At the last Graves disease conference in October one of the physicians mentioned that about 4-5% of Graves patients could go hypo in time for no apparent reason. We do know that some Graves’ patients swing from hyper to hypo due to TPO antibodies at play. TPO antibodies are most often seen in patients with Hashimoto’s disease (Hypothyroidism). It is possible to have both antibodies (TSI & TPO) in which case thyroid regulation becomes more of a challenge for some people. Work with your Dr. to pinpoint exactly what is at play. There are various blood tests that your Dr. can order to help pinpoint the problem and give you some direction going forward. If your Dr. is only ordering TSH testing, ask him if it is worthwhile to check the FT3, FT4 and TPO as well. Keeping a copy of all lab reports is something that I have found helpful as well.
Take care,
James