My left testicle seems to be sitting higher than it usually does. I feel a dull pain in my lower left abdomen. Usually my scrotum is more relaxed than it is now - it feels tighter than it usually does. Should I see a doctor? I have self examined and I can't feel a lump but I am in a small amount of discomfort and it certainly feels weird.

What are some possible causes and is there cause for concern? Thank you very much in advance.