Curious

So i had love making on one of my fertile days which was aug 29th and i have 2 different apps this one and the app my days as of the my days app i was suppose to start on sunday which is about right but then this app said i should had started on monday. Either i should started already & i havent. I get cramps on my sides at different times and feel oozing through out different times. I dont even feel like im going to start just super bloated. Could i be. I know i should take the test but at the moment i literally have no money. In my gutt i feel like i am a slight ness my bf stomach has been hurting too and to him he doesn't know why.