Little pain in penis after kinky sex

My gf and I were experimenting around with some clothe pins on each-other last night, one of the things she did was put a clothe pin on the shaft of my penis (it was only on for like 5-10 seconds before she took it off and moved onto other areas, I was worried of damaging it).

Anyway, since then when I get an erection the area where the clothespin was on stings a tad. It only stings a tiny bit, and then goes away pretty quickly. There's nothing visibly cut or wrong, the area doesn't seem to have a large vein or anything, and I have no other strange pain or anything. I'm just excessively paranoid about these things (which is partly why I have us take it slow with exploring these things to begin with) so I just wanted to check in to make sure this is normal / not something to worry about?