Disappearing symptoms?

Nicole • Married 3 years! 💞 TTC for 3 years. MC 11/15. BFP 3/16. First baby due December 1st, 2016!!!
So I'm only about 4 weeks and 3 days. Found out last Thursday we were preggers. Have had really sore boobs and nipples since then. Yesterday I noticed they started to become less sore. I wake up and their not quite as sore as they had been (Mind you they were sore since the Sunday before we found out). When I take my bra off at night though, their sore, and then the morning not quite. 
Is this normal or should I ask my clinic to run my numbers again? I'm so scared about miscarrying....again :( 
Blahhh...