Pregnancy testing

My period is due to start on Monday, I’ve had a pretty regular 28 day cycle. My ovulation peek was on day 14 of cycle. I took a pregnancy test tonight (I did drank a lot of water today) it came back negative. I have sore breast that have gotten more sore today. They aren’t sensitive but just dang sore. I’m tired, crampy, and feeling  nauseous at times. Could this be a false negative? We’ve been trying 6 months and I guess I’m just really trying to hold onto hope at this point. I’ve read where drinking a lot of water before testing can dilute the test. Anyone out there have a similar experience and actually was pregnant? Thanks