my cycle is every 29 to 34 days and my flow is very heavy for at least 4 of the five days. My cycle was due on the 14th and it did not come. On the 17th I had very light bleeding for about maybe an hour and then the next day a very light spot when I wiped and then nothing.I took a home pregnancy test today that came out negative.I still think that I may be pregnant due to some of my symptoms:tender and sore breasts,frequent urination and the missed period. Could I still be pregnant?