How much possibilities ?

My boyfriend and I have been trying to get pregnant for about six months. About four months ago I had all pregnancy symptoms even missed a period but ended up being negative pregnancy test. Still have been trying but nothing . In December had unprotected on the 28 my ovulation days are from the 25-29 and then again on January 7 and had my period on January 12 and as only three days long but is usually five. for about four weeks know I've been felling kinda sick kinda like I'm gonna throw up but I don't and sometimes with certain smells triggers it.Some times I have kinda like a t feeling on my belly on . And sometimes pain on my left side of stomach . Now I got light cramps that come and go. What are the popossibilitiesf pregnancy? Don't wanna have my hopes up and be disappointed again if I take a test