What's wrong with my baby?

Sooo.. my babygirl turned 9 months on the 28th. About 5-6 days after she turned 9 months old she has changed a lot! She cries all day, she wants to be held and if you put her down she screams. When her dad leaves for work she literally throws a tantrum.. Putting her to sleep is a hassle now, between her constantly bitting my nipples and doing alligator rolls it takes about an hour- hour and a half to put her down. Idk if it's growth spurt or what's going on.. anybody else's baby do a complete 180 after turning 9 months?