Widow seeking baby before it's too late

My name is Jodi and I am a 41 year old elementary PE and Health teacher. My husband passed away unexpectedly from a heart attack about five years ago. I decided I was ready to start dating again about three years ago. I wanted to fall in love, get married and have a baby. Dating these days is very difficult and I have not had any success. I'm running out of time to have a baby so I decided if I'm going to have a baby I need to just do it on my own. Any help would be greatly appreciated!!