Questions on breastfeeding

Melissa • Baby #1 (BOY) Due 03/27

Idk what to do. I’ve been feeding at the breast. Pumping occasionally and giving bottle. And supplementing with formula 1-2 times a day. My son is almost a month. He’s sometimes really fussy at my breast. He will feed at my breast for 30 min or sometimes more and then immediately want more. I don’t know if I’m having supply issues? He’s producing enough diapers per day but like I said we also offer pumped milk or formula on occasion just as needed. When it’s just feeding at my breast he barely goes two hours between feeds. Feels like he always wants to feed but then sometimes gets fussy during the feeding? Which breaks my heart. He eats better from the bottle and just seems more satisfied in general with bottle. What should I do?? Was thinking about exclusivity pumping for a few days or maybe one week to see how he does. I just want my little guy to be fed and satisfied! Any tips on exclusively pumping?? And lately he’s been having a lot of dirty diapers with my breastmilk. And he appears to have upset belly and gas :( I’m just feeling bad and unsure what to do. I know breastfeeding and breastmilk is best but I just feel kinda stuck.