Are early pregnancy signs something to get your hopes up over??

My hubby and I just started TTC.  Last month I would have laid every dollar I owned on the table that we were pregnant.  A few DPO I started having crazy symptoms, sore ta ta's that were full and heavy, cramps like Menstral cramps, mood swings like never before, food aversions, bloating, did I mention the mood swings?  My hubby was ready to sleep in the barn.  Then about 9DPO I got sore swollen glands behind my ears and the next day I was rotten with a cold.  I also woke up  feeling different, empty is the only way to describe it.  Even the ta ta's (which were unbearably sensitive and sore) felt almost back to normal.  I went from feeling 100% pregnant to 100% not pregnant.  And after 2 negitive tests, I was pretty upset about it.  My hubby felt that there was no way we could be that soon but I could not get past the way I was feeling. I know it's very rare to conceive your first time out of the gates but the way I was feeling I have never felt that way before.  So, are early symptoms to be ignored?  What the hell are they if not actual symptoms of early pregnancy!?