Just got BFP but so scared...

​I just got a BFP this morning and am coming up as 1-2 weeks on clearblue test (early days) but am so nervous now, I had a missed miscarriage in April and it was the most awful thing I've ever been through as both me and hubby wanted it so much, timing was perfect and then we got the heartbreaking news at our 12 week scan. Fast forward 3 months and I got a BFP this morning and as excited as I want to be, I am crapping myself already that it could happen again. I know people say 'stay positive' but I think I'm going to be a constant bag of nerves until I see something on screen. Has anyone else been through this? Any ways to cope? xx