Threadworms, really need urgent help!?

i took an Ovex tablet over 24 hours ago and it hasn't kicked in yet, i can still feel them wriggling around in my anus and counted 10+ in my stool earlier, it won't go away i'm being so hygenic i've cleaned and washed everything! when i go to the loo now im using anti-bacterial around my anus and on my cheeks and washing my hands before and after going to the loo. i don't know what to do now i can't take it anymore i can't sleep at all and i'm crying and screaming with my head in my pillow - please help me i'm only 14 :'(