Babygirl is only 3 months & just wants to sit up?

My daugther just turned 3 months, mind me she is really strong and does good when doing tummy time etc. her pedestrian told me she is good and healthy. But recently she doesn't really want to be payed down like a baby in my arms.. she pout and cry sometime until I sit her up in my lap she'll be happy. Sometimes I sit her down on the baby pillow but not fully sit and she forces her self up to sit.. idk if it's bad or normal??