No stock in order anymore of tons of items

Don't understand why EVERYTHING the past 6 to 8 weeks has been out of stock. Can't even send an item back for an exchange, they don't have stock. Can't have anything under warranty replaced because they don't have stock. I have over a dozen items I buy regularly that haven't been replenished in almost 3+ months, from alcohol to jewelry to lights to cologne and perfume. Whats going on?