These are symptoms of anxiety. If you ever go to a Psychiatrist (which is absolutely not a bad idea) these symptoms will more than likely be in the screening.
I could suggest going to your local grocery store in the vitamin/pharmacy section and picking up some Melatonin. It's naturally produced from your body so I wouldn't take it all the time, but it is all natural. Try one or two tablets under the tongue 30-45 minutes before bed and see how that puts you down.
Keep a notebook tucked in your nightstand, and if you wake up, or if you have worries before you lie down to sleep jaught it all down. it's going to look rediculous but don't be self concious about how you feel.
If you have insurance or the funds to go visit a psychiatrist you can go see one and let her know how you feel. From what the sounds of it it is an anxiety.
We all have anxiety but the severity differs. I have a social anxiety that is growing stronger by the day, but there are some veterans in here who suffer worse symptoms as well as the same symptoms you are facing.
Don't stress yourself out about it, it's just your mind playing tricks on you. but don't let it snowball effect your worries, you need to talk to someone about it, and sometime when you talk to your friends and family they will tell you "just to stop thinking that way." it's common and it's not good advice. How do you change or stop feeling the way you naturally feel?
You're in the right place for support here if you ever need someone to talk to.
Therapists can offer talks about how to change the way you perceive these thoughts, and a Psychiatrist can provide you with medication (and safe medication) to allow you to sleep through the night as well as ease anxiety throughout the day.
ask lots of questions and get yourself rooted to what's bothering you, don't let it beat you up girlie.
Have a great day.