Hey there, John.
I'm not qualified to diagnose anyone like that: that's something you'll need a mental healthcare professional to help you with. In the event that kind of healthcare isn't within your reach or abilities, I'd say that if you start doing some things known to help with anxiety, and they help, then you can probably figure for yourself that anxiety is an issue for you. I can also suggest a couple books with this that might help you assess that for yourself. That all said, I hear you self-assessing and thinking anxiety is an ongoing issue for you: you know yourself, I don't see any reason to second-guess that.
You're right, too, that when someone struggles with anxiety, there are often some things where it's way worse and tougher to manage, and pregnancy -- or just plain sex, altogether -- is a very common one of those for people.
Here's a page we have with a bunch of resources for anxiety, including some apps and books that are good for this: Anxiety and Other Mental Health Resources
I particularly suggest "My Anxious Mind" and "The Mindful Way through Anxiety" on that book list for you. The first one I think is also particularly helpful if you're doing self-assessments, rather than working with a therapist. When it comes to apps, I think the Headspace app is extra-great, and the website for Headspace is also wonderful: https://headspace.org.au/
I hope that you can start to find some help with this. If, in fact, you do have general anxiety, then no doubt, it's been making your life very stressful: anxiety can really just make everything feel like a struggle, or make you feel like you're walking on eggshells all the time. Even a little relief can go a long way, and I hope that it does for you.