Stressed...please help me relax!!

Hello ladies. New to this, but need some encouraging words. I'm 4 weeks 2 days and can't relax about things. I've been trying to get pregant for 18 months and finally happened with IUI. I have been having moderate to light cramping and usually on one side. I haven't had any bleeding, but I'm nervous something is wrong. Is it normal to have these feeling of worry all the time? I want this so bad and prayers have been answered, but i can't just relax. I've read cramping is normal, so i need to relax. Also, my hcg levels on Monday were 39 and Friday they were 169. My Dr. said they were progressing normally and wants me to get more blood work Tuesday. I've read these levels are normal, but it seems like other women posting have way higher levels. Any insights? Thanks everyone