Is this hemorrhoids or an STD?

I'm 19 years old and I've only had one ual partner. I haven't been ually active since December. Recently the area around my has been itching. I thought maybe it was irritated from shaving in that region but with further inspection I found a small bump near the opening of my . It's flesh colored and smooth. I've been researching HPV online because I'm scared at the possibility of having warts but it doesn't look like any of the pictures. My diet has been really poor lately and I am almost always constipated due to having to take prescribed pain relievers so I'm guessing and hoping that it's hemorrhoids. However, can a hemorrhoid be a bump at the opening of the or does it have to hang out? The bump is just really itchy and so is the area surrounding it. It hasn't bled but I've read that not all external hemorrhoids do. I would think that one would have to have in order to get warts but I could be wrong. Can someone please help me out and take an educated guess as to whats wrong with me? *note: I will be going to the doctor I would just like an opinion to help me sleep better tonight*