Pregnant with our rainbow, fears and hopes- am i alone with these thoughts?

Okay so first time mummy pregnant with our little rainbow baby boy. I'm currently 31 and a half weeks along and we FINALLY have everything our little boy is going to need, have even decorated his cupboard (we only live in a one bed bungalow, with rent being so cheap will be waiting until little one is 6 months until we upsize, so have turned our walk in wardrobe into a makeshift baby room! Harry potter style) both me and daddy are super excited and feeling super impatient.... But I can't help but feel scared that something could go wrong, we lost our first baby last November at 6/7 weeks along and something in me, regardless of how happy and excited I am to meet our little boy just keeps nagging that it's all too good to be true. Am I wrong to feel like this? I feel almost like I'm unprepared to be a mother because of these feelings, like I won't actually realise it's not all just a dream until I have him in our arms. I know you can never be truly prepared as a first time mummy to be, but am I alone feeling this worry? It seems like all our friends that are either new parents or are expecting seem so much more confident than I do? I'm praying this confidence will come the moment he's here and my worries finally cease. I just want to be the best mum I can possibly be for our little boy and im scared that to keep worrying about what could and couldn't go wrong is stopping me from being mentally strong enough and confident enough to do so. Has anybody gone through similar and experienced the same feelings? Did they go away and did your confidence increase your little ones arrived? Does anyone have any suggestions to help me put these feelings of worry and being unprepared as a result to rest?