Discouraged with low milk supply

My son will be 6 weeks on Monday. I’m getting very discouraged with my supply being so low. I’ve thought about giving up bfing my son. He is my last baby and I want to be able to look back and be happy with my choices. As I won’t get another chance. I’ve been struggling with low milk supply off and on since he was born but the last week or so has been REALLY bad. I don’t make enough for my son to bf every meal. I’m having to supplement with formula more often than I’d like to be. I feel like maybe my milk is not fatty enough to sustain him. I feel like I do not have time to pump after bfing as he wants to nurse ALL THE TIME. He does not sleep much during the day. The rare occasion When I can pump I don’t have much milk for my son after to have meal and he gets very frustrated. I don’t know what to do. I’ve tried fenugreek which I feel like has been helping but it maybe causing gas issues with baby boy. I just started taking brewers yeast 2 days ago without a noticeable difference. The fenugreek seems to work fairly fast to boost my supply. Although I’m not sure it’s worth my son screaming from gas pains. Money is tight right now so I can’t buy any others supplements until around the first. Currently I have fenugreek, blessed thistle, and brewers yeast on hand.