I am sorry for the loss of your husband for you and your family. I would advise speaking to a qualified financial professional - there may be a way to put some of the money into retirement assets for you, pay down your mortgage etc and a professional that reviews all your assets would be the best person to review.
You may find that the colleges your child is interesting in attending are not affordable and you still have time to plan and work together to find a list of right fit schools.