Struggling to be positive ...

I’m 7wks +2 and I’m having difficulty being positive about this pregnancy. On 1st April I miscarried at 7 weeks exactly. Whilst I’m over the moon I’ve fallen pregnant so quickly I’m just filled with anxiety all the time. My boobs have gradually stopped hurting all the time (they do occasionally ache and my nipples can be really sore) so now I’m convinced this is the beginning of the end. I’m constantly analysing everything which is stressing me out so much. I just want to be positive and happy but I’m scared as soon as I do it will be taken away again.