Extreme BABY FEVER!

I am 19, turning 20 in two days. He is 22. I am in nursing school and he has graduated from college and has a great job. I am extremely baby hungry. I have Nexplanon in, so it is pretty much impossible to get pregnant, but I seem to still have baby fever. Why is this happening? It is ridiculous. It is becoming stronger and stronger. And the thing is, I don't even want any kids for a good 7 years or so. What is wrong with me..?!?