@mayrihyam I would say that if your friends have noticed but have not said anything then no need to bring up. If they are oblivious then no need to say anything either. It's your matter and you are dealing with it.
Now if, for your own piece of mind, you would feel more comfortable if you knew for sure that your friends knew and were okay with it then maybe tell them. But only if it is what you want to do, not because you feel you have to.
I could see that if you are sneaking wet sheets and clothes to wash in the morning or if you wear protection stressed about disposing of them you may want to let them know. But aging if it is an issue that you want to and feel comfortable in brining up with them.
Otherwise just keep doing your thing and not worry.