Help here lol

So my little one is 4.5 months and is usually a good sleeper, he will go to sleep around 9-9:30 and wake for a bottle at 4 or 5:30 then go back to sleep and wake up again at 8-8:30 am. Now for the past two nights he has been waking at 1-2 am then again at 6am then goes down again until 8. At the 1-2 am he will not go back to sleep with a paci nor rocking only wants a bottle. Then he will squirm at 6am and I can rock him and he will crash, with a little fighting. I've tried not letting him nap past 7pm. But still, last night he did it again. Can it be regression? He was going through it but we fixed it with a schedule and he was great now its back??😥 HELP! LOL