The most important thing to remember is that every girl is or will be going through the same thing. I suggest having a chat to a close friend to see if she is also embarrassed by this - I bet she is! However, it is still essential that you change your pad or tampon regularly. Tampons need to be changed about every 4 hours (maximum of 8 hours) to avoid a rare but dangerous bacterial condition known as TSS (Toxic Shock Syndrome). Try and pick a quieter time in the bathroom to change-maybe in the middle of lunch rather than right at the beginning or end?