Please tell me this will pass, I’m dying

My 7 week old baby was sleeping okay, 2 hour stretches. Sometimes 3.

Then a few nights ago slept the best he ever has and only woke up twice to eat.

The next night after this he then started waking up EVERY SINGLE HOUR ON THE DOT?! And is harder to get back down.

I’m absolutely exhausted and so depressed :( I don’t understand why this is happening, I changed nothing.

What the hell is causing this? Please tell me it’ll change