I know exactly how you feel. Our situations are so similar it’s uncanny. I had 3 healthy pregnancies then miscarried my fourth, then got pregnant again immediately no period between. I was absolutely terrified the whole time. That baby is nursing right now! But after a loss, everything is different. You try to protect your heart by assuming it’ll go wrong again. I was an absolute wreck. That eased after I had a scan at 10 weeks and then I felt much better after my anatomy scan. You’ll keep feeling better as you progress. It’s highly highly unlikely anything will go wrong. The nurse told me that getting pregnant that quickly after a miscarriage made it less than 5% chance I’d miscarry a second time.