I was shaving my pubic area when then I accidentally used someone else's razor while taking a shower. I didn't take long to notice that I used the razor but I'm worried I could have catched a std (herpes, ect) or HIV. Once I was done with the shower I just applied alchohol to some of the shaven area. I'm not sure if Im just over exaggerating or so.
Thanks for your question,
There doesn't sound like there's any risk from the situation you're describing!
The reason that razors come up in STD conversations is because certain STDs are transmitted through blood. But in your case, you didn't cut yourself therefore there was no way for someone else's blood to get inside of you. You were also in the shower, which would've washed anything on the razor away. Two points already that tell us there was no risk.
Hope this helps!