I'm so sorry for your horrible experience last year, I can completely relate as I had 2 MC last year as well and I'm now 15 weeks. I found having my 12 week scan was a massive reassurance but I can't say I'm 100% better. Tell the sonographer you are nervous and they'll tell you what they're doing rather than having a big silence.
Be aware that from 12/13 weeks, symptoms start to fade a bit and you begin to feel 'normal'. It can be quite scary when it starts but please be reassured that this is supposed to happen and doesn't indicate anything is wrong.
Some things that have helped me:
My stomach has lost the bloat and began to grow a bit and that has provided me with some reassurance.
I have been reading a booked called Pregnancy After Loss by Zoe Clarke Coats, I would recommend you get hold of a copy for yourself.
Speak to the midwives and tell them you're struggling with anxiety and they can refer you for talking therapy. I have been lucky to have access to therapy since I had a positive pregnancy test and it has really helped me.
Another thing to try is mindfulness meditations, an app like Headspace or there will be loads on YouTube. Also look for some breathing exercises. It's important to interrupt your anxious thoughts and do these exercises before you go down an anxiety rabbit hole.
Talk to friends, family and your partner about how you are feeling and please be assured that the feelings you feel are normal! Especially considering the horrendous experience you have been through. You're not alone, in fact there is a pregnancy after loss thread on here for women due in November, see if you can find it.
Take each day one at a time, you're doing great!