I can't tell if it's another gray hair or just paint...

I've been painting Megan's room/Michael's office since Monday. The big, bright flowers I painted on her walls 10 years ago did NOT want to go down without a fight. 2 coats of primer (3 in some places!) & then I ran out of paint with about 2.5 walls of the 2nd coat to go. I ran out this morning to buy another gallon. It's going to look really nice but I'm just ready to be DONE! It's time to get started. I'm hoping to knock this baby out in 2 more hours. Wish me luck...