hey….first of: are u on birth control pills?? if u r then sometimes those are the side effects of using the pill. On the other hand,if ur not on the pill and ur period is late, feeling sore and peeing a lot…..then my strongest suggestion is for u to buy a pregnancy test as soon as possible.(e.p.t test). Well hope everything goes well and good luck! 😉 let me know how everything goes! take care.