PPS: Or, maybe you got a school nurse or physician? People are so open to these problems these days.
PS: Or one parent. With my boys, they would hesitate before telling their father about something like this, but not about telling me. Then, you guys could figure out about making an appointment that does not sound embarrassing. (I mean unless they can give you better advice) Try them, if you have not yet)
Two ideas, and I have two sons who are both uncircumcised. (18 and 12)
The first one is to see your doctor about this, because at least my son's doctor would want to know and have something helpful to say.
Second, maybe you just have not exposed your penis head enough to the 'light and day'. Keep pulling your foreskin back as much as possible and just first expose it to the air. Then slowly do more, like touch it. So on, and on. See if it becomes less sensitive over a few days by doing this.
If not, again, it's absolutely fine to see a doctor about this unless you really hate your doctor and don't trust him/her.
Would you be OK talking to your parents about this? that matters the most. If it was me, I would really hope my sons would tell me, and they would.
Good luck! kat
And tell how it goes, I would like to know.