Worry wart

I have been a "worry wart" my whole life, and it SUCKS. I worried about my parents all of the time when I was younger. Of course it only got worse after my father passed away. So naturally I am a complete freak when it comes to my daughter, every little thing worries me. It doesn't help that she has had some minor problems since she was born, first she had problems with milk/soy formula (this made me feel HORRIBLE for giving up breastfeeding so quickly, wont happen again.) so she didnt gain weight properly and I felt like a terrible mom. She was only 10lbs at 3 months because she was throwing up none stop. She was put on nutramigen which did wonders but was very expensive and sometimes a hassle to find, she was also diagnosed with acid reflux and had to take medication once a day. These things are very minor but for a first time mom/worry wart they were really hard to deal with. At 9 months I was able to switch her back to regular enfamil lipil which made me think it would be easier to transition to milk, wrong! She had a reaction to the milk and had gotten horrible diaper rash for the first time ever. She remained on formula until about a week ago and she was able to transition to milk with no problems. Like I said these things are VERY common and not something I normally fuss about, I know there are babies and families with so many more issues then us so I hate complaining. I feel like something has always been "wrong", we haven't gone a month without something coming up, her getting sick, having a reaction to something. Recently B started screaming in her sleep and thrashing around horribly. My first thought was night terrors, so I googled it and read that children aren't capable of night terrors or nightmares until after 18 months. But B is showing definite signs so what should I think? I think the worst, of course! I start worrying about seizures. I watched a couple videos of children (much older children) having night terrors and B's is 10x worse then any video I saw, and she's years younger. I hate sitting here thinking "what if" so I made an appointment with her pediatrician at 3 and I'm anxious to see what she has to say! I want these to be solved, it is the worst thing in the world seeing your baby like that. This morning she had a pretty bad spout of screaming and thrashing that lasted 3 hours, I read that when a child is having a night terror to not restrain them and basically just wait it out, so that's what I did and it was horrible. I think I cried just as much as her.

I'm sorry if this post is just all over the place lol I have a lot on my mind, not to mention I'm pregnant and sleep deprived. So I'm probably not making a whole lot of sense.