Do you think she noticed this embarrassing thing?

In my college class we were writing a essay and when we finished it we could leave. I finished at basically same time as this other girl in my class, so I left room literally right after her, she noticed me and we started talking. We have talked to each other before right after the first class because I needed to use a phone, so I asked her and we had a conversation, but that was 2 months ago and we have not talked since then, though she said goodnight to me after one class when I was waiting for my ride. I’m very shy and have not really talk to girls in school, so I am not used to being around them. We were walking together, talking to each other across the courtyard. (it is a big courtyard and takes 5-8 minutes to walk across) At about half way point of the courtyard, I felt that I was getting really hard for no reason and it got worse the more I walked. To make matters worse I was wearing basketball shorts. I was carrying a notebook that I use to write in, so I moved it down more to try and hide my hard on. We got to the front of the school and said goodnight to each other. Then when she was walking away she turn around and waved to me and I waved back. Do you think she noticed my hard on and if so will she bother talking to me again? Just for more detail she was dressed nicely but nothing at all provocative and she acts nice to everyone and we were walking next to each other the whole time.
Do you think she noticed this embarrassing thing?
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