And... I’m pregnant again... and terrified

So pretty sure I’m pregnant again- had my miscarriage April 1st at 9 weeks and got a positive on a pee test on Thursday- have my dr appointment Tuesday to see what’s in there. I’ll be 6 weeks— I really wanted this pregnancy but now I’m terrified... every twinge I feel in my body... everything makes me think “oh this is the end...” anyone else experience this- anything I can do to chill out? I’ve been trying to keep it a secret and do other things to keep my mind off it but I’m afraid miscarriage has ruined my mind lol