Aww, Lucy hon, I'm so sorry you're stressed. I know I went through something similar - I couldn't stop the panic until we got past the point of our mc. I think for us PAL, ironically the stress of a bfp is unbearable! Fingers crossed for you.
I had a few moments of reprieve. My sister (who's a gp and my armchair quarterback doctor) recommended massage. I went for one, and it really helped. I had about a full day of significantly reduced stress. My sister said there's no mc risk from massage, but for your own peace of mind, keep the rmt away from your abdomen.
DH and I keep reminding ourselves that one way or another, we are one step closer to our baby. That really has helped us.
Good luck Lucy! We're always here to chat if you need.