Thanks for all of your advice ladies.
Well I got results for my T3 and T4 levels today and they are dropping which is great news, plus some of my antibody test results are back and they are negative for Graves.
The Physician asked me if I had taken the beta blockers yet and she said "Oh good, just throw them out!" OMG lucky I didn't take them. I thought it was strange to be prescribed them even though my heart rate was fine!!
So it's looking like it is overactive thyroid caused by gestational thyrotoxicosis which should resolve itself some time during this trimester. Best news I have had in a long tim!