Feeling neurotic.... peace of mind?

I had an ultrasound at 6w4d and now I am 9w2d. I don't have another US until 12w5d and I have been so impatient and neurotic! That is not my personality at all but I can't shake this fear that there won't be a heartbeat when I go in next or that something is wrong.

I am high risk because of my diabetes but my blood sugars are running perfect and I have no indication that something is wrong other than after hellacious symptoms last week I am finally feeling a bit better.

All I want to do is hear that heartbeat and the thought of waiting 3 more weeks is torturous. Can anyone offer peace of mind. Is there anything I can do to comfort myself?!