So that sounds like he has just told you to 'stop in May' - without seeing you or seeing what your bloods are like first? I can see why you feel insecure and I'm not surprised you feel a bit funny about it.
It felt really strange the day I stopped, after all to been held together for the best part of a year with carb and Levo, then waken up one morning and just not take it - I spent a lot of time waiting to see and wondering what would happen but in actual fact nothing happened.
I probably said earlier that after a month I began to worry about relapsing and having to have rai so I spoke to my GP and once I had got that sorted out then just got on wth life. To be honest I forget now that I'm in remission.
My TSH has gradually crept up from what it was when I stopped the meds - my last NHS blood test - in October 2014 - somehow or another I was missed off the final visit schedule and it was almost a year after stopping the B&R that I turned up to be discharged - it didn't half confuse the little registrar chap I saw, he was very young, oriental and I think new because he went off to speak to my consultant before he made his decision which I thought was a bit odd.
I think the notes on the rai discussion I had wth my GP must have been on my case notes (they file share) because he didn't mention rai at all - maybe that was what he went to speak t the big chief about LOL. Anyway at that visit my results were TSH. 1.5 (0.35-5.5) FT4 15.4. (10.00-19.8) so it had risen quite a bit.
I'm not sure about thyroid storm - you could always post a new question asking about that and see if anyone has had that problem - but if you do start to feel odd in any way you know what it is and can take action right away.