I just need a little reassurance.

Today I am 5 weeks and 2 days. For the last week I've had pregnancy symptoms: nausea, sore breasts, cravings.

All of the sudden today I have none of that. I'm super emotional though. In June I had a miscarriage at 5 weeks and 2 days. So I cant tell if my emotions are because I'm scared it's happening again or just a pregnancy symptom. Anyways today my cm has had brown in it (like old blood). I'm so scared that I might miscarry again. Has anyone had this happen and it just be nothing and went on to have a healthy pregnancy? Or did your doctor recheck your hormone levels? I'm super worried about my progesterone levels but my doctor says that it's not something to be concerned about. I did 3 rounds of clomid to get this baby and I dont think I can handle losing another one.