Confused

Good evening! So i was supposed to get my period on Wednesday, I had light bleeding and felt like it was starting, but it only stayed spotting. Same for Thursday and Friday. I freaked out a bit and took a pregnancy test which came back negative. Then today I have all the symptoms of getting my period. Cramping and light bleeding. But nothing substantial. I don't have any other pregnancy symptoms asides from my uterus feeling heavy which often happens during my period.

Now, that being said the week before last was incredibly stressful at work. I wasn't sleeping because of stress. Then this past week was stressful as it was the week before vacation.

With the negative test taken 2 days after I should've gotten my period, should I still be concerned?