N.O.
I would wait 3 more days (very hard to do, I know) and test early in the morning with am urine (the strongest). You may be testing too early if your period was off last month. If still negative and you still have the symptoms I would have a blood test done. I remember when I had my IUD removed when it was time for baby number 2 I had 2 or 3 months where I would have bet the bank I was pregnant and I was not. When I actually was pregnant (about 7 months later) it was not as obvious accept for the lone symptom of heartburn.