weight gain

okay so this is my first pregnancy and I need a bit of advice because all my family and my midwife are like don't worry but I don't want to sugar coat it.

so from being pregnant I've gained bout 2stone (I'm 28 weeks), is that like loads? it feels like a lot but I'm still looking a bit skeletal (I lost a stone in my first trimester but I obviously gained it back) :/

does this mean I'm gonna look like a saggy balloon after my baby is born or will I be okay?

I'm also a bit worries that my baby could be huge! so far she is in the 93rd % so does that mean she's gonna be like 8-9 pounds.

sorry if this sounds really vein, I'm just a bit sensitive about my weight and also terrified of tearing from on end the the other. I've heard a lot of horror stories and my friends aren't being very supportive of how my body is gonna change so I just wanna prepare myself if I need too :(