Help! I can’t relax.

This is my first pregnancy and I’m about 4 weeks. I feel paranoid about every little thing that I feel in my body. I had some mild cramping so I got nervous. I had a couple hours of brown spotting when I wiped and I totally freaked out. How do I just relax? I feel like I want to keep testing everyday just to make sure I’m still pregnant. I’m driving myself and my husband crazy :( help!