So... was that not the regression?

So my LO was sleeping 7-8 hours a night as soon as she hit 9 weeks up until 13 weeks when she started waking for middle of the night feeds again and would wake around 2 or 3 every night and thankfully it was just the one time and then she'd wake for the day around 7.. I know that's barely a sleep regression but this has gone on now for a month every single night that she's waking up between 130 and 3 to eat and the past week she had a couple of 8 and 9 hour nights sprinkled between some 5 and 6 hour stretches (which of course I woke multiple times because my body is now trained to do that so I didn't even enjoy it) so I thought "oh thank god she's finally coming out of this regression.. Taking Cara Babies has worked.. She's going to start sleeping through the night again yay".....

Then tonight, the very DAY she hits 4 months... She's woken up at 11, 1130, and now again at 1230 and was screaming so hard I finally abandoned stupid SITBACK and had to feed her... I broke down and sobbed. I felt so much anxiety and even a bit of anger wash over me thinking to myself "If what I have been experiencing the last month wasn't her regression and she's just now starting it, I'm going to rip my hair out!!!" I'm so.. effing.. tired.. My husband only sleeps in the same room and helps on the weekends because he has to get up at 5am for work and on the weekends I get up with him when she wakes up because I've felt guilty if I don't but now I may tell him he needs to go solo on the weekends so that I can get at least one or two nights of uninterrupted sleep because the first 8 weeks of her life she woke multiple times a night so I've literally only had about a month of okay sleep (because I would still wake up multiple times even when LO was sleeping because I was anxious she would wake up at any moment)

Please tell me I'm not the only one who has experienced this.. Regression then regression x2 thing.. She didn't even wake this much when she was sick with a cold last week.