Oh Abi, bless you lovely.
I agree with bubbles, I think the emotions you are feeling are normal considering the shock of what you've been through.
What I would say is, you might think your body is failing you, but look how far you've come. You are almost in the last tri and other than the bleed your body has done everything it's suppose to have done. Pregnancy is the hardest thing you can put your body through, all the changes that happen that we dont see is immense. I think you should forgive yourself of this bleed and know that you and your body are doing amazingly well. I totally get the anxiety though, I had heaps of it in the first few months of this pregnancy. And still to this day check the tissue for blood, and if I don't feel her move for a couple of hours my anxiety goes from 0 to through the roof in seconds! Try not to read too much into the whole 'anxiety produces an anxious baby' . You can read so many horror stories on Google, and most of them are based on opinion rather than medical evidence. Personally I think when baby is here and in your arms is when you need to think about your anxiety as I do think a calm and relaxed mama encourages and calm and relaxed baby. Just my opinion though.
As for the sickness, It could be a mixture of the anxiety and the progesterone. But it could also be normal pregnancy related. My sickness has returned and so has my aversion to dairy :/ and I recall this happening in my last pregnancy too. So I'm guessing it's normally for a few of us.
As far as UTIs, it is always better to be safe than sorry to get a UTI checked out and if you don't feel well in yourself then all the more reason. As bubbles says, cranberry juice can help, it lowers the pH of your urine which stops that heavy, burning feeling, but you'll still need antibiotics to help clear it properly.
Hope your chat with the doctor helps you today. If your close with your mother inlaw maybe you could chat with her too? Xxx