How do you stay excited about a pregnancy and not constantly worry about a miscarriage.

Hey guys, I know that this may not be the perfect subreddit to ask this but I don’t use Reddit often and I trust this community. I’ve seen how they help others.
So as the title suggests I (25) just found out that I am 4 weeks pregnant and we will be getting our first ultrasound done on the 16th. My husband (26) and I have been trying for almost two years now and I should be really excited but I am nervous or feel numb at best. Not because I am not excited to be pregnant but because I am convinced that I am going to miscarry. I know that more common in the first trimester and I have PCOS and a uterine septum so this puts me at a high risk for a miscarriage.
Now we are not telling very many people, we told my sister and one of my close friends who lives near by and then my husband told his immediate family. And everyone keeps telling me i should be excited. But I am really struggling to be. Every cramp I have I panic, every time I feel discharge I check to make sure I am not bleeding. I just don’t know what to do. I wish I could talk to my mother about this but both my parents died in the last 5 years, so I can’t talk to her but I know she had similar issues. So please if anyone here has had similar issues I would really appreciate the advice. I know it’s something where only time will tell but I feel like I am driving myself crazy right now.
Thank you two hot take community.