Back rubs and tickles okay?

Just had a wonderful friend rub and tickle my back for an hour above my bra line.. felt amazing... but is this safe?? I heard massages can lead to miscarriages if pressure is placed in the wrong spot or something.. it wasn't really a massage just more of a tickle and pushing a little bit harder with fingers for the rub sensation.. will all be okay?? I'm 15 weeks and 3 days pregnant! I though above bra should be okay as it's a way from tummy.. If the pressure was enough like a massage will I be in trouble. I worry very easily :(