When people get into trouble with meditation, it's usually because they are practicing without knowledgeable support. Ideally, your practice of meditation leaves you feeling more connected to life and your own experience. But sometimes, people think they are meditating when they are just dissociating, and that is the very opposite of improving your connection to yourself and your life. Additionally, sometimes people will push themselves to go into difficult material (past traumas and such) without support, and in the process re-traumatize themselves. But when there is appropriate support - from a meditation facilitator, spiritual director or contemplative therapist - you can get knowledgeable guidance and a safe place to ask questions and share experience.