What happens if there is gap of time between two insurance policies in a home with a mortgage loan?

I had an oversight with the payment of my homeowners insurance and by the time I realized my insurance was unpaid, 45 days had elapsed. I am in the process of fixing the problem, but, will the lender force me to buy their "force placed insurance" if I can not get coverage for the past uninsured lapse of time? Before I call the lender to ask I want to be informed.