6-Week Growth Spurt

I just need solidarity from other parents in the NB phase still. LO will be 6 weeks tomorrow. She's had some fussy days, but nothing like the last two have been. She's cluster feeding, eating frantically and then crying on the breast, which is so alarming because until now that has been her favorite way to soothe. Then she cries intensely for an hour, and nothing helps except bicycle legs for a minute at best. Then suddenly she falls asleep and sleeps like a rock anywhere from 20 minutes to two hours. When she wakes up, we go again. On top of it, I somehow have a clogged duct, which is so confusing given how often she is nursing. I feel so bad for her, and also myself lol. I know it's just a phase and we'll come out on the other side but I did not expect it to be this intense.