Rainbow BFP... So anxious 😱😥

Nicola • I`m a 32 year old teacher from the UK. Had my rainbow baby in September 2017 after miscarrying twice. Had a chemical pregnancy in January and now TTC #2
I got my BFP for my rainbow baby on Sunday and I'm so worried that I'll miscarry again. I'm trying so hard not to think about it but I've got butterflies all of the time 😱 Any suggestions how I can try and relax?