Take a deep breath and let it out slowly...now relax. Worrying yourself silly isn't good for your baby. The chances of miscarriage decrease considerably the further along you get. If you have not had any problems with this pregnancy then there's no reason to be overly worried right now. If you are still feeling pregnant that's a very good sign! Take it day by day and your scan will be here before you know it!
I completely feel where you are coming from. I was and still am the same way at times...
my last pregnancy ended in miscarriage and i was so convinced things were going wrong this... its like everytime I had relief, a couple days would go by and I would get paranoid again... I have 3 weeks until my next scan, and Im 17 weeks... but still get scared at times because now im afraid there wont be enough growth..but i remember being 10 weeks and still so nervous and i didnt even get a scan until 12 weeks. But now i have a doppler so i can listen to the HB.... I can feel the baby move but even now its like I havent felt the baby move since last night.. what if something happen over night....
Last time I puked for the first time in a long time, and it was really rough so then i am worried that caused something wrong or i didnt eat enough afterwards so my baby starved (even though we know people have healthy babies after having hypermesis or whatever it is called)...
All i can say it is hard not to worry when you want something so bad and it feel so fragile... Hope everything goes well for you.
It's ok and totally normal to feel like that. I had the worst anxiety before my first scan at 12 weeks. Not a day went by that I didn't worry about having a miscarriage. But once I did see that little baby bouncing around in there, it was a load off!
Try and relax, it's tough but you need to keep yourself busy so you don't worry so much.
Good luck and I hope you have a great pregnancy!