Im really nervous help!!!!

So I'm 4 weeks and 1 day and I have tarible cramping, nausea, throwing up and constipation. Sometimes I can't tell if I'm cramping or if I'm constipated. Is this normal to have early in a pregnancey? Should I go to a doctor? Is something wrong? I've been looking up reasons why and it's scaring me because it all seem like something is wrong... Or is this just pregnancey and I have a long way to go?