Is it possible I could be pregant

Ok so last month a few days out of my fertile window I had sex then a couple of days before my period I had    Pelvic pain the same kind I had last time I was pregnat I also had cramps but then I had my period it wasnet really a heavy period just normal a guess and at the end of it a had brown discharge for a few days x now am still having pelvic pain , the need to urinate a lot and feel pressure in my stomach I also have white dots on my nipples and feel nausea I feel like I did the last time I was pregnant but my boobs have not been sore but mine were not  sore all the time last time So am just wondering is it even a option that a could be pregant before a waste money on a pregnacy test ??