Missed period- is this real

I usually never ever skip a period (even if I’m stressed) my husband and I are trying to conceive . Today I’m 5 days late, I started cramping in the beginning like I was going to get my period but never did? I had on and off cramps for the first 4 days of my missed period. Never had a tinge of blood in my underwear. Now I feel slight pressure on my vagina . Also I have had normal PMS like I would be on my period. Could this mean I’m pregnant? I want this to be true. Sad thing is I took a test yestur but it was negative, is there any chance it’s still early for me to not test positive? Help! Need advice