having a hard time feeding...

So first two three weeks go good then I start stressing bc there was two days where I did nothing but nurse my baby and it was getting to where I couldn't take a break to build any milk back up and I was needing to start pumping and saving milk to go back to work and so my mom made these sheets for me to fill out to keep track of all feedings and how much and how I feed her bc I stressing out thinking she wasn't getting enough. And she was. And apart from that now there's been a few days where I've lost my appetite well then a part from that one day I felt sick like with the flu or a cold and my milk production dropped a lot. And I wasn't getting sick with the flu or anything my body was reacting from an infection in my left boob which I'm still trying to fix and get rid of and I'm barley producing any milk now what do I do?? I've started to make myself eat so how long till it starts making milk I'm still nursing and pumping constantly!? I'm just not seeing any spike yet! And I'm really getting scared That I'm gonna have to go to formula!! And I'll feel horrible bc it'll be all my fault... And I can it's starting to be unsatisfying to my baby girl bc I KNOW she's not getting enough now...