third pill pack helppppppp

I'm in third week and third pill pack and started spotting yesterday and I'm concerned if this is normal as the placebo week is approaching this Sunday ! Why am I spotting and will I get a period on placebo week ! Note the first pill pack I got my period on the last three active pills, and second pill pack got my period exactly on placebo week and this third a pack I'm confused why I started spotting a week before placebo ? Please help me