( quite long ) not sure what group to post in really but need some advice and someone to listen to me

Hi, I've been so desperately been wanting to get pregnant now for ages. My partner told me in 2014 that in 2016 we can start trying so I waited. We are both now in our 20s. I wanted it so bad I wouldn't stop thinking about it and I would just pray every day it would Happen  soon, I've been pregnant when I was a lot younger and miscarried ( protection was used ) . I didn't even know I was pregnant at the time nor was I wanting to get pregnant.
Anyway, me and my partner now feel it was the right time to try. I conceived in 1 month and I'm now 4 weeks and 6 days pregnant. I hate myself at the moment because I'm snapping at everyone, worst mood I've been in. Over emotional too.... I started crying in the doctors waiting room today for no reason at all. Me and my partner are in a bad place because we can't stop bickering ( probably my fault because of my foul mood ). Basically what Im writing this for is because I am terrified of miscarrying, I keep searching it and searching it but I'm so frightened of this not resulting into a healthy happy little baby, I have been taking all the vitamins and folic acid etc but is there anything I can do to stop worrying about it? I'm still really early pregnant and I know there's a chance I could miscarry 😭😭 I feel so blessed but I over think and worry , needed to get this off my chest and sorry for the long long story 😁