My first pregnancy I had no signs until 8 weeks and then massive vomitting for ages & ages.... I still had no other symptoms other than that for the first 11 weeks, then I had low BP and fainting issues, never had the sore bb issue.

Second pregnancy I had vomitting starting from 5 weeks and low BP again but no other symptoms.

Like the others have said, it could be nothing & just be the way your PG progresses (one can only hope ) or it could be taking longer to show... if you are concerned at all, go to the GP and get them to check your levels. If anything it will lessen the anxiety.