changes in sleeping patterns??

Laine
First of all, I know I am a very lucky mom because my little girl started sleeping 5-8 hour stretches from about a month and half onward. But my baby just had her 3 month old growth spurt last week and since then, she's now only sleeping 2-3 hour stretches through the night 😢 
I just went back to work two weeks ago and I'm prone to migraines so this has been very tough dealing with the sudden lack of sleep. Is it normal for her sleeping patterns to change like this after a growth spurt? Is it temporary or will this be her new schedule for a while? She's about 3.5 months old now and I'd even be thrilled to get 4 hours in a row!