Its all pretty normal stuff. I had all of the above symptoms starting at 6 weeks pregnant. Try to relax and stay positive :)
Every pregnancy is different u are only 4 weeks I didnt show any signs until 8 weeks don't focus on the miscarriage bc u r going to stress yourself out just be positive
My boobs came and went on being sensitive.I'm 15+3 now. Now they still only hurt sometimes, but my nipples are what's sore. Unless you have bleeding, I think your ok. If you ever don't, call your Dr or go to the er.