Asymmetric ache in pelvis?

5 weeks 4 days today and have been having an intermittent ache on the right side of my lower pelvis. It’s very slight, not painful. It has been there nearly the whole pregnancy, just more noticeable yesterday and today. My HCG levels were rising fine earlier in pregnancy, but they were collected very early.

Should I be worried about an ectopic? Is it possible to have asymmetric aching and it still be an intrauterine pregnancy?