3 month sleep regression! 😩

So my now just over 3 month old had been sleeping through the night for the past 3 weeks (sometimes woke up once or twice for a few seconds, but the pacifier would help him go back down). But now the past few nights he has been going to bed around 7:30/8, gets up at 12 (usually a pacifier holds him over until 3ish) and then at 3ish for a bottle (was not feeding during the night before). Any tips?! Sincerely desperate and tired momma 😩