Milk supply and bottle please help!!!

So I’m have 2 challenges right now. FTM with a baby turning 4 months next week. He’s 17 pounds 9 ounces now. 9 pounds 2 ounces at birth.

1. I feel like my milk supply has decreased. My breasts used to leak throughout the night maybe 3-4 weeks ago. They felt fuller before. I’m currently pumping and it’s not even 1 ounce yet. I’ve noticed at night my LO pulls away from the breast grunting off and on but will bring himself back to it. I’m worried he’s not getting enough milk. I could be overreacting because he isn’t super fussy at this time he’s just tired. What is happening with my supply? I drink lots of water, maintain a healthy diet, take my vitamins.

2. He also won’t take a bottle! He used to 3-4 weeks ago maybe longer (mom life for me = no concept of time) but now he just screams like I’m torturing him. What can I do? I can’t really get away from him because of this because he just cries until he gets the breast. Tomorrow is my graduation so I have to be away from him for 3 hours and I’m super worried he will be unhappy. I want to be able to leave him for a few hours once in awhile but his refusal to take a bottle gets in the way.

Any suggestions would be greatly appreciated.