My period is really light not normal, but right on time 2 pregancy tests negative can i still be pregnant?

Okay my husband and i have been trying to have a baby i have been off the pill for two months now when i first got off my period was late which i know can be normal cus my body is getting used to that. Now its the 2nd month i guessed my period would start the same time as last month i was one day late from when my last period started which i know can be normal. But I am unually light and its my first day of my period, im bleeding but really light almost like im getting off my period but i just started today. I have taken 2 pregancy tests today but they are both negative. could i still be pregnant ?