Don't worry, I get that too. In fact, I have period pressure (not pain , but pressure happens in my vagina and clit) right now. I know that my period is due soon. I feel like I have it right now, but I know it will come by tomorrow morning. Believe me, your period will be here tomorrow morning at the latest.

Do you masturbate? I find that if I masturbate when I feel my period will start soon, I play with my clit and it will help the blood come out quicker and less painful.