Assalamu alaikum - Living in fear of the unseen and needing guidance

Assalamu alaikum. I don’t really know how to start this, but I need guidance from people who understand Islam and won’t judge me. My heart’s been heavy for months and I need an Islamic perspective. A couple of months ago something happened that changed me. I haven’t felt normal since. A bit of background: about a year ago I was talking with cousins about paranormal stuff. They mentioned sleep paralysis, dark shapes, feeling choked, and being unable to move with eyes open. One cousin shared a really terrifying experience and even though I tried to shrug it off, the fear stayed with me. I prayed I’d never go through that. I didn’t take it too seriously then, but after that talk I started feeling… off in my room. Not a sound or figure, just a wrong energy. I ignored it and told myself I was overthinking. Fast forward to two months ago. My younger brother has always had nightmares, but nobody looked into it seriously. One night around 3 AM he screamed so loud the whole house woke up. I woke up shaking, heart racing, not knowing what was happening. That’s when my dad finally called an imam to come check on him. When the imam walked through the rooms he said there was a “strong presence” in mine, my sister’s and another brother’s rooms. That sentence shook us. All my old fears rushed back and everything felt real. I didn’t understand how someone could “sense” unseen things, and that unsettled me. We’d also been under a lot of stress at home for over a year because of money problems, and though things calmed a bit after my brother’s episode, I still felt anxious in my room. I played Surah Baqarah for three days but the unease stayed. My mom then took the three of us (except one brother) to a ruqyah centre, and what I saw there traumatized me. People were screaming, shaking, muttering, crying… someone behind me kept kicking my chair. They asked us to keep our eyes closed for hours while surahs and duas played loudly, saying the jinn might possess us otherwise. The reciters were blowing and lightly spitting into containers of water families brought. The whole place was overwhelming. I silently begged Allah to protect me. When I got home I was shaking and my mind felt numb. I couldn’t go outside that day. My sister was deeply hurt too - not only by the experience but because our parents, especially my mom, seemed to truly believe we were the problem or possessed. It shattered both of us emotionally. Since then I’ve been living with constant anxiety. I can’t sleep alone in my room. I feel watched or unsafe even when nothing is happening. I try reading Qur’an, doing dhikr, and praying, but the fear remains. Sometimes I sleep in my sister’s room because I can’t handle it, but she gets frustrated, so I force myself to sleep alone and the fear builds again. If no one had told me there was “something in the room,” I probably would’ve moved on. But after hearing that, remembering my cousins’ stories, and seeing what happened at the ruqyah centre, my mind hasn’t rested. I need guidance: 1) How much of jinn possession and dramatic ruqyah reactions are actually supported by Islam? 2) Are the ruqyah centre practices like blowing/spitting into water from the Sunnah? 3) How can I tell if my fear is spiritual or just anxiety? 4) How do I recover from this trauma and feel normal again? I’m not trying to accuse anyone or deny anything in Islam. I just want the correct understanding so I can breathe again. My heart is exhausted. I want peace and clarity. JazakAllahu khairan for reading.