It's completely natural and understandable that you would be anxious. Anyone would be. But from what I know (and I'm not a doctor) the medical things you're describing don't necessarily sound like red flags. If anything, you might just have a quiet, gentle kid. Really.
With my own son, I was very anxious because I could scarcely feel him kicking at all, right up to the end. He did pass his no-stress tests and everything else, he was just at the low end of the spectrum for fetal activity. Scared the living %&#()@# out of me.
And, he was born completely healthy and has been ever since. And, he's a very quiet, thoughtful, observant little boy. More of a watcher than a doer. He does have low muscle tone, which I now think I sensed when he was in utero, but as far as special needs go, this is a pretty mild one. I wouldn't have him any other way.
I also think, rather than trying to monitor everything, is there anything you can do to just work on relaxation and acceptance? Prayer, meditation, yoga, that kind of thing? If you're like me, no amount of information will ease your mind, but it may be possible to occasionally reach a sort of higher plane where you realize that all you can do is hope for the best, and the rest of up to God or whatever higher power. You know?