sleep regression?

Is there such a thing? LO would typically sleep 730pm until 2-330am, nurse, then back to sleep until 530-6am. Every so often she'd have a bad night. For the past week, she's been getting up every 1-2hrs. Only difference is we started her on food. Is this normal? I feel like we're back at newborn status 😐 advice? She isn't teething yet. She's 6m