Ear lobe bleeding due to earing?

Hi, i had my ears pierced when i was 5 and have been wearing earing most of the time from that age up till when i was about 14, now i m 15 and haven't worn any earring for a year and i have recently brought new earrings and put them on and when i took them off the next day in a shower my lobe started bleeding, it looks a mess =/ what can i do ?? why ?? i might be asked not to wear them to school because of our stupid rules in school, but i dont want to have bloody earlobes holes visible like that ! help ???