infection, is that like a sore leg muscle with twitches and bad back (not from exercise but similar to those feelings) or is it aches and pains like if you have a fever
to fever, and muscle aches by themselves do not suggest ARS. When it occurs, it involves muscles throughout the body. The canker sore undoubtedly is unrelated.
There is no basis for being scared. You can expect a negative HIV test result. You don't need to wait any longer; testing will be valid now. Although it takes up to 6 weeks for some newly infected persons to develop positive tests, those with symptoms always have positive tests within ~10 days after symptoms start. So a negative result now will prove your symptoms aren't due to HIV, and will be 90% reassuring you weren't infected. You can then have a second test at 6 weeks, if you wish.