You should see an endocrinologist and have them do a full thyroid panel. Hashimoto’s is when your body attacks your thyroid gland and your bloodwork would show thyroid autoantibodies (like TPO). High TSH alone would not mean you have Hashimoto’s. You need to find out why your brain/body is working so hard to produce thyroid hormone. Did you have your free T3 included when your TSH and T4 were checked?