Experiences - SWIM tried acid once and had a bad trip is it a bad idea to take it again...?

[alberry18]

SWIM took a microdot for the first time with a friend (who regularly takes acid) called "dave" at a psytrance rave and had quite a bad time. Peoples faces were all distorted and scary, even her friends were scaring her, except one guy "frank", sounds were all weird and she got slight paranoia. She managed to stay fine by sitting and talking to "frank" all night, when she left the rave things calmed down, people looked normal and she had a few nice hallucinations.
Twice since then, she has felt like she has been on acid when she hasn't purposely taken any and both times have been bad again. Both times she has been with "dave" and either "dave" is giving her acid or its just effcts from the first time. One time in particular lasted for hours and hours. Is this uncommen? Both times she had been on other drugs but she saw "dave" again the other day whilst on a lot of ketamine and she didn't feel as if she was on acid at all.
Both times this had happened she had drunk some of "dave's" water. Could this have had acid in it? Or is she just trippin out?
Is it a bad idea to take acid again? She was thinking about maybe taking it again in a year or so.
Pleaaaase help because "dave" is a really good friend and she doesn't want to think he would do such a thing. Is it all in her mind?
She also sometimes gets flashbacks when shes really tired or hungry where still objects will slightly sway.