Home Test Says No But I Feel Like It Should Say Yes

My husband and I have decided to try and start our family last month. Our believed conception day was around july 20-23 (which I read to be the most fertile time in my cycle). About a day or two afterwards, I started feeling extremely nauseated, had about 1 or 2 "dizzy/faint" feeling spells, my breasts got extremely sore to touch or even walk around!!! And just this morning I noticed white "goose pimples" on my nipples. My period was due saturday, august 6th (hoping and praying it didn't come!!) but I "think" it did. I noticed very light spotting on saturday (not enough to even cover half of a panty liner), and today (sunday) I had about 1/2 a pad worth which is very light considering I have been consistently a very heavy bleeder. Out of curiousity from the breast issues and nausea, I took one of those home pregnancy tests the day my period was due and it came out negative. I was so dissappointed I almost cried!!! I could have sworn it would have come out positive because it's like I just "feel" like "i am". Am I just crazy and over reading all these "pregnancy signs and symptoms"?? Could it be just hormones running wild and teasing me??? I am not experiencing any cramps at all like I would normally during my periods....Just a little odd feeling in my lower abdomen, but nothing close to menstrual cramp feelings. My breasts are still sore and those goose pimples on my nipples are getting bigger and more seem to be showing up!!! I just feels so strange in the lower abdomen area....Nothing painfull, almost like a "stretchy" like feeling. Any one ever experience anything like this?? Does it sould like I could be pregnant and should I test again???