How To Cure Pain In Testicles?

Hello, I hope someone can help as its starting to get a little worrying. Basically I was playing football the other week and I noticed that my right testicle started to ache a little, I ignored it and the problem has persisted for a week just getting little aches on and off. Its in my right testicle (as I am aware or the surrouding area) I don't think I was hit in my testicles but I may have been, its mainly when I put my left leg forwards it hurts or when I am siting down it might start aching a little and it aches quite bad when I am playing sport just wondering if anyone could help or give me some advice as I wondering whether I should see a doctor. Many Thanks