I’m pretty uncomfortable in PE too, you aren’t alone! I feel like my coach picks me out too, he’ll call me over and talk to me sometimes when we walk the track, or make me team captain when I don’t want to be, or other stuff like that. It isn’t bad, and I don’t think that he means anything by it, but I wish he would ignore me more rather than pitying me or treating me like I’m some lonely kid he needs to be buddies with.
Its pretty natural to feel uncomfortable in PE, especially if you have to change in front of people, and its a class that sort of puts you out there physically. Maybe you remind her of her daughter or a young version of herself? Maybe she just thinks you’re interesting, or maybe you fall funny, (people watch me because I take dodge-balls to the face on a regular basis, and its pretty funny, my coach actually made one kid stop throwing them at me because I was so uncoordinated I didn’t stand a chance.) I hope your class improves!