Confused with period.

Lena

My period came a day late and very light compared to my normal heavy flow. I am not bloated what so ever and I’m normally very bloated. I do t think I can be pregnant because my husband had a vasectomy last year, however he never went back to make sure it worked. I am a bit sick at the moment kinda like I have the flu, can this affect my period so much? Like make its very light?