I'm a teenager..she's a mother..?

Last weekend I decided to play around with my ex-first luve...we didn't have sex...we used hands/fingers,so that Monday after the weekend was over I decided to tell my mother her reaction was like any other mother..shocked,then after I told her the full story she was glad that I didn't fully have sex but still was of course somewhat disappointed..but the thing I am upset with is that she keeps asking me am I telling the full story,is this going to happen again,has it happen before,why didn't you tell me sooner,are you pregnant,can I tell other people for advice,I font think you can go anywhere else without me...so am I over reacting or is she just being motherly cause I feel that she doesn't trust me anymore..I'm a prisoner in my own home now ;\