FTM / Low Milk Supply

FTM here. I wasn’t going to post but I’m to my breaking point. I need some advice from experienced mamas out there. I had my baby girl on December 31st. She’s currently 2weeks & 1 day. Im trying to exclusively breastfeed but really struggling. I’ve been breastfeeding and pumping every 2/3 hours. Im able to breastfeed her and she typically seems satisfied off that which allows me to save what I pump (typically 1oz - 2oz) but these past couple of days, even after feeding, she’s still super fussy. So I’ve been feeding her a bottle of what I pump too! Therefore, nothing extra to save. And sometimes still fussy… How can I increase my supply?

I’m already pumping every 2/3 hours, drinking 1-2 gallon of water a day, drinking 2 body armor drinks a day and eating oatmeal / lactation cookies.

Any advice is appreciated. I’m wearing myself out by thinking I’m not providing enough for her.