Hi OP,
Firstly breastfeeding is really tough going for many and you should be so so proud of yourself for getting to this point, you’ve done amazing to ride the first initial weeks out !
Secondly, something that jumped out was that you said you had introduced a bottle of formula, which might be causing your issues.
As others have said cluster feeding is completely normal for bf babies and happens lots, especially in the beginning, however, introducing a bottle can really mess things up.
I can confirm this because it’s just happened to me, I bf my first and gave expressed milk by bottle .. no issue, transitioned great between both, assumed I could do the same with number 2 and she quickly developed a huge bottle preference, bottle feeding is much easier for them and so I found my lo started to fuss on the boob, got upset and there began the demise of our bf journey.
Now if I had the opportunity to solely bf and not use a bottle for expressed milk (which I didn’t for a number of reasons) I’d have stopped that bottle and bf exclusively. But for me, I needed the option of giving the bottle also and number 2 just decided she didn’t want to bf anymore. It’s caused me huge emotional distress to be honest, still dealing with it now but anyway what I would say to you is if you want a successful bf journey, for now id stop giving that bottle, baby will get into a better routine with bf again and you can probs work through the issues butttt if you really want the option of the bottle, your journey will likely be cut short as that preference for the bottle will likely grow over time.
If it was my first baby, I’d have dropped the bottle and went back to bf ex because I had the time to dedicate to it, second time round I’ve not been able to do that.
I hope you are okay, feeding journeys are really tough and it’s really confusing and upsetting when things don’t go how you’d hoped