Sleeping horribly

Anyone else’s baby start sleeping terribly around 9-10 weeks? We just finished our leap, but now her sleep is all over the place. She was sleeping two 3.5-5 hour stretches at night but the past 2 nights she’s been up every 2 hours or not going to sleep after feeds at all. Did anyone else experience this and if so did they go back to how they were or is this the new normal? Of course I’m going back to work in a couple of weeks so I’m freaking out that I’m not going to get enough sleep to function if she continues this pattern. Please tell me it’s just a growth spurt.