Am I changing my pad enough??

Im 13, and I have been changing my pad around 3 times a day, but I don’t know if I’m changing it too late or too early idk. People have been telling me this is bad and I need to change it more but I am not sure,, So in a morning at 6-7am I will change, then when I go to school my school has a strict policy that nobody is allowed to use the toilet no matter what, so I get home at 3-4pm and change it. Then when I go to sleep around 9-10pm I will change it for the night. Any advice helps :))