my period was supposed to start the 18th but it didn't I started off with super bad cramps, and symptoms that i usually get right before i start mine.. But not this time today is Sunday and i still I'm having cramp and pains in my stomach and lower abdomen.. I have been freaking my self out . I already took a pregnancy test and it was negative, but i heard they don't always work.. I really scared i want to be pregnant but in the same time i don't... oh and i have been having acid reflexes as well and light headed every once in awhile.. my feet hurt, and i started getting really tired lately.. Any ideas???

Another thing was that i started to notice that after me and my fiance would have sex i would go clean my self and notice a lite pinkish some time reddish discharge... tat scared me as well.. and my stomach has been getting alittle stiffer and times.. and then goes back to normal.