Do i have an std?

Hello, i am not a very secual active person ive had sex with only 2 girls the past 6 years. I was wondering if i have a std.

It started with my testicles being really itchy the past month. I see nothing to strange where the area itches. Recently ive had weird things pop up around my penis. I have a small rach near my waist with a small yellowish bump and a hair coming out of it. (Could be an ingrown hair) it does not itch or anything like that. I also have another small rash on the oposite side with no bunp or hair. Finally i found a small bump near the head of penis (it does not itch). 

What i am most worried about is the itch i have on my scrotum. Any help?

My scortum has also been tight with a redish tint to it.