Feeling drained

My fiancé and I welcomed a baby boy on July 24th, 2021! Love him so much ! But I’ve Been feeling so drained! I’m a High school science teacher and my fiancé works from home. We decided not to put baby in daycare so he stays with my fiancée during the day. With a that being said i feel i don’t have a minute to myself. I wake up at 5:30 every morning and return home from work at 3:30. As soon as i get in the House i take the baby until his bath at 6:00pm.. he’s usually down by 7. Once he’s down i shower and get ready for the next day and then the cycle just repeats itself all over. My fiancée makes me feel as if him being home with the baby is harder or more work. I hate it. We both work! I go straight home everyday. Once i get home he’s relived .. he has several hours to himself! Even on the weekends I’m with baby 24/7.. he goes in the other room , play games .. total free time to be alone. Only time i get free time is if I’m in the shower or nail salon. It’s becoming so overwhelming.