My period is over 4 weeks late and right above my vagina is very hard and sometimes there's a very sharp pinpointed pressure pain, what could it be?

Take pregnancy test: Once your menses/period is late, it's time to take a home pregnancy test, if you've engaged in unprotected sex even just once. If negative, perhaps you're describing an early bladder infection. If you don't want to become pregnant, talk w/doc about birth control options. Start research here: http://www.mayoclinic.org/healthy-lifestyle/birth-control/in-depth/birth-control-options/art-20045571