How u no u got it or can it be something else

You have to find out by a test at a clinic or doctor's. Yes, 'it' can be any number of things. You don't say what your symptoms are, but you need to go anyway.

You know you have it or if it's something else when a doctor tells you what it is.

It's one bump n light skin spots

Show it to the doctor. S/He can see it, we can't. Please don't post a picture.

Yes, could be, if you are sexually active, it could be several things, So only way to know is to have an exam. If in the US, most county health departments have clinics, and there are often other clinics to be checked at also

It's just spots nothing else n I'm going to go n see