Advice about testicular lumps

Hi, I got really freaked out today when i noticed a lump/ node near my testicles today. I mean the lump is not new or anything cause I've known about it for at least 4 months. Now the reason on why i am consulting you is because I have taken more notice to it and the lump is also changing to a bruise type red. Now to answer the question about "why are you telling us now and not 4 months ago" is just because of where it's located...
This bump thing is not positioned on the actual sack it's self. It's located above the sack and at the base of the shaft. So i am not really sure if its on the sack or not. It's sort of like a half-way thing. The only thing i can tell you is that its a lump and it has a bruise color to it and i have had it for more that 4 months. And plus the fact that i can visually see it on the skin compared to on the testicle. Well i am really confused on this so if you could possibly help me out it would be greatly appreciated...