it doesn't sound stupid or strange.

I think part of it may be has to do with the sheer realisation that you're getting the treatment that you don't think you deserve, or you're not used to.

I don't know if that makes sense or not, but say that you're used to be being treated bad, and then someone treats you with genuin concern and in a nice way

the reason you could be experiencing such a strong emotion may have to do with that- you've never experienced before, so you litirally don't know how else to react

you're not really sad or upset, you're just.... touched, an not sure how else to handle it