Tamra....good news.. have a great trip..
Just one thought and only because I am going through this... did they check for shingles? For some reason when you said elevated antibodies that is what the doctor said to me yesterday....those words.. I have elevated antibodies. I did have the rash, probably the reason he asked you, but you can get internal ones too and although people think it is an age thing, you can get them at any age. Chicken pox is around now and when you have had chicken pox before as an adult when you come in contact with chicken pox or are run down, you can get shingles.. Off my shingled soapbox, this is for everyone here as well as Tamra.
Also, how off was your thyroid, enough to take thyroid medication because if you need that, you should be taking it.. Another one of my things that I tend to harp on as that little thyroid regulates everything in your body and if it is off it can cause headaches, leg aches etc..
Anyway, take your time and smell the roses during your trip...