I had cramping and brown bleeding from 5w to 6w4d. I went to the GP who did an internal and it showed the cervix was closed, then had blood tests and internal u/s a week apart for comparison. Fortunately the second one showed a blob with a heartbeat that was progressing and my HCG levels had risen appropriately. Coincidentally morning sickness kicked in the day of the 2nd u/s and hasn't left! I am waiting for my 1st OB appoitment next week for the next u/s and hoping that everything is ok.

I would recommend going straight to the GP and getting them to do the full check.