3 month regression??

Not sure what happened, up until recently my three month old was doing really well in her crib. We just started putting her in about a week ago bc of the constant waking up and noises she was making in our room. So she recently started sleeping 6+ hours in her own room and I was so pleasantly surprised. Well now a week later it seems she’s back to the way she was before I moved her into her room waking up every 3-4 hours again. For example I fed her tonight at 8pm and she fell asleep at 8:40pm and now she got up at 12:50am. So I just now fed her again but it took me about an hour to rock her back to sleep. I expect she’ll be up again in another 3-4 hours again. I know there will be a four month sleep regression, but Could this be a three month sleep regression instead??