Moms of young children

Moms of babies is it normal to feel like u just need a lil break sometimes my daughter is 8 months and lately she's been acting so spoiled she crys and crys till ONLY I hold her in the store at home anywhere she dose this I try my best to do 100 things at once and to 
Please her as well its so hard I just want a lil break sometimes dose anyone understand me ??