One year old fighting naps

Help! My one year old used to take two naps a day. He would wake between 6am and 7am. He would normally go down for a nap between 10 and 11. And again around 2pm and 3pm. Now I'm lucky if I get him down for even one nap! He fights it so hard and cries and screams. He eventually gets so over tired at night that it's hard to even put him down at night.

I had him on a great schedule until his father stayed home a week and a half for vacation and now he has no schedule at all. Please give me some advice and suggestions to get him back to napping! I cant get anything done around the house with a tired, cranky toddler 😭😭