Baby sleep at 6 months

Help a mama out! My little one was sleeping ok with one overnight feeding (we do formula) but now she’s sleeping horribly. I have a good routine and schedule with her so idk what I’m doing wrong. Bath (every other night) bottle and bed by 7pm. But recently she’s waking up at 11p-3/4am. Then up for the day at 7. Is it more sleep regression..!!?? I’m so exhausted.

Her naps are one morning around 10a for an hour and afternoon around 1/or2 for 1-1.5 hours. Any advice? I usually hold her, let her fall asleep on me and put her down. I don’t known if I’m strong enough to have her cry it out ugh