I am so nervous ?

I am 4 weeks and 5 days along. I am an absolute nervous wreck!!! It seems like so many women are having miscarriages and it scares me to death that I am going to have one...I wanted this so badly and I will be so devastated if something happens. This will be my second child. My first pregnancy went perfectly and I had a great delivery. I'm only 20 years old so I'm not high risk..I'm just so dang nervous. I've taken about a million tests lol don't judge. The lines are all WAY darker than the control line but for some reason I'm still worried :( I just need some encouraging words and some prayers please!