Nervous

With my first pregnancy it was so much different! I was very tired and my boobs were so sore! I found out I was pregnant 2 days ago and had no clue! Only having sore nipples (to the touch) & a missed period! It makes me nervous that something is wrong and I'll lose the baby..I'm only 5w4d and dont have an appointment until June 11th!! I'm freaking out!!!