Feeling worried. Please help! Any advice welcomed

My symptoms are going away. I had a miscarriage last month and found out I was pregnant again this month. Am I stressing to much. I got the darkest positive thus far today, but I am so so worried. I am only about 5 weeks pregnant. I really worry I will go to the doctor and my baby won't be ok. Is this common, has this happened to anyone before?? How did things turn out for you?!