Spotting or light period? Help please

Je

I came off the pill in August after being on it for 13 years. While on the pill I never had any issues with spotting or anything. When it was time to have my period I would have it for up to 4 days and be done.

Now that I am off the pill every month about a week before my period is supposed to start I have spotting. Is this normal? I read spotting is when you count your new cycle as starting which would mean my cycle length has gone from 28, 27, 26, 21 days.