Should I find a new doctor?

I have had Hypothyroidism for 16years. After having my daughter 6months ago my thyroid went hyper for a while so my doctor took me off my Synthroid for 2mnths and retested me. After 2mnths of being off of it my TSH was 8.2 so I was put on a very low dose of 50mcg (always been on at least 125mcg). It has been 8weeks I just found out my TSH is 9.76 (even worse than 2mnths ago and I'm on meds for it). My doctor is only wanting to raise it another 25mcg for another 8 weeks but I know from years of dealing with this that I should be on a much higher dose. I am frustrated because I gained all my pregnancy weight back after losing it w/in a week of having my baby, I'm exhausted and can't concentrate. I have given my doctor 5mnths to get this worked out.Should I find another doctor who is willing to be more aggressive? I want to feel energized again and be able to lose this weight. Any advice would be helpful and appreciated!!