Hypothyroid and tingling lip

Okay i am hypothyroid - on synthroid - but i must say my doctor prescribes me .50 mcgs and i take that amount - then start feeling like my heart beats faster and feel more anxious after a few months - but my tsh is normal - around 2.2 - so i start taking half and feel better with heartrate, etc. but now my top lip (part of it) was tingling today and my the back part of my tongue felt tingly too. my sister who is a nurse asked me "have you been messing with your thyroid meds again? " i said yes and she said duh. not sure she meant that was reaction to the synthroid or a symptom of not taking enough she just said ask your doc. well my doc was out today so i won't hear back from his nurse until tomorrow. it has stopped now - kind of off and on. but it sent me into a full blown panic attack at work today. sheesh!!

anyone else have this symptom when they are not taking enough synthroid? or feel anxious when you take more than want to?
i think my body's norm is higher than what my doc thinks it should be. like when my tsh is around 4.0 i feel the best but not sure they can prescribe me between .25 and .50 mcgs.

what do you take? when he checks your levels does he only check t4? or both and antibodies? i have hashimotos -

i take synthroid - used to take levoxyl - thnk they are the same thing.

  I am also hypothyroid and  every now and then I experience tingling in my lower lip, I told my  doctor about it and he told me that could be from stress. I take levoxyl 100mg. So I watched when I got all stressed out and it would flare up.

Your right! I take levoxyl  name brand as I have tried the generic and I coughed my head off for a year before it dawned on me what was wrong.  I told my doctor about it he wanted me to get  chest x ray, nothing was wrong, I eliminated some supplements I was taking and still had the coughing only one left that could be doing it, after I told my doc about it he said sometimes the coating on the pill can make you cough. Now I find any food that I am allergic to will make me cough. I have been taking calc/vitamin D and I haven't noticed any lip tingling. I will keep taking that. I have also  noticed my bones hurting more, you might be right on the low calcium. My one  toe is curling, and one of my toes is trying to hide under the other one. It is almost time for a bone density scan.

I'm not positive but I think when he checks my thyroid level each year he checks that too. Cause I saw it on my test results once. But I will mention that to him next time

Thanks!
Mel