Pregnant

My period is late and althoughRobert and I have used condoms the 3 times we have had sex, there is still the pre-ejaculatory fluid that comes before hand. I was supposed to have it on February 3 but now its the 7th and I really hope that my cycle is just changing. I don’t know what to think and I’m nervous. I’ve been eating like crazy, I don’t know if its just PMS or what. Maybe I’m stressing myself out. I did the same thing last month. I was sitting at work and my stomach began to hurt so bad and I was in tears so I took a break, and managed to get myself to sav-on across the street and I purchased an EPT. My period came the next day. I don’t know how much longer I should wait before I suspect something is wrong.