It's very likely they will reinstate your policy if you pay the amount past due and any potential fees associated with the cancellation. Because each company has their own administrative rules regarding reinstatement, it's very likely for you to be able to get your policy active again.
Coverage & Claims
It is certainly possible that your insurance company will allow you to reinstate your policy, but there is likely a cut-off date so you should contact them ASAP to inquire about reinstating your coverage. Often times when a policy is cancelled for non-payment, the customer has a grace period to make payment and keep the policy active.