2 month old growth spurt sleep?

My LO turned 2 months old today and she was up at 6am I fed her and she was up then napping till about 12 today and slept from 1pm till 5pm I fed her then she went back to sleep from 5:30pm till 8:00pm( just a couple minutes ago) and went back to sleep! I've fed her about 4-5 times today but she's been sleeping ALOT today and wondering if it's just a growth spurt and normal? I checked on her to see if she was still breathing I was so paranoid lol