Is this a normal thing that happens in college or is it just me? I'm going through a lot?!

I'm in my early 20's and about to graduate. My school is a public commuter college. Anyway, this is not the 1st this has happened, but I ignored it. This semester I have 2 male professors. Also, I sit in the back of the class, to the side, with a room of about 25-34 students for both professors. One of my profs is in his 50's, the other late 30's to early 40's possibly. My professor in his 50's keeps looking at me during class and creates nicknames for me. While taking an exam I asked him a question I didn't get on the test and instead of helping me he whispered, " are you married or single?" I was so shocked and said, "What?" And he said it again and eventually after avoiding the question he says "oh I was just kidding I know you shy and quiet which is why I asked.

Now my other professor in his late 30's to early 40's is married. On the FIRST day of class he kept looking at me and making a lot of eye contact with me. He would even make comments about ppl sitting in the back of the room and glance at me while saying it. It got so frequent I started keeping my eyes down on my notes. When I had to work in groups with my fellow classmates he impulsively sat in a chair right next to me, leaned iin closer to me and started watching what I was doing on my iPad and said "uh oh" in a teasing way. Another time I came to class in a yellow dress because I had an event I had to do after class the man looked me In the face then down at my breast and started smiling at me. Wtf?!
Added (1). The man keeps giving me the SAME grades on all my papers. I didn't do a paper once and asked if he accepts late papers. He said yes and that he takes off a 1pt. When I handed in my paper and got it back He only took of.3pts instead. Why lie? For my final paper I got a grade that's in the top 5% of the class. Once I was in deep thought about an assignment he gave and He calls on me out of nowhere and says "is everything ok, name)? How the hell did he see me thinking? I felt embaressed!
Added (2). He's done more stuff but I can't remember now.

In nowhere shape or form I consider myself attractive. I'm shy and quiet, as well as would be considered a plus sized girl maybe of the curvy side. Most men don't like "heavier" women k suppose So i ruled that out.

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