Help! Baby kicking low- vibrating bum and vagina

Hi I am 23 weeks and since last night my baby has been kicking or moving "down there". I have been getting used to some strong kicks but here I feel it inside and it feels like she is kicking her way out. Last nighy was really weird as it vibrated in my bum which was really weird! Anyone had this? Please say yes it is kinda freaky! My friend who had a baby a few weeks ago said it sounded like hiccups...