Advice please!

Hey Ladies! I have never in my life missed a period, I am now three days late. The day before and of my missed pierod I was really cramping and bloated thinking it was going to come. Of course I had taken a six days sooner test and got a negative result. So at this point just waiting for my period. It hasn't came and I'm three days late. Took another test this morning and it was negative. Could the cramping on the day of my period been implantation pain? I'm so lost with the negative tests. Has anyone had an experience like this and what was the outcome. Thanks so much. Wishing you all the luck with your tests :)