One night I was laying down and got dizzy then started to feel like I was gonna pass out I started getting very negative thoughts and couldn’t focus I was sweating real bad and thought I was dying. What was happening to me?

Hey, that sounds like a scary experience! First of all, I'm not a doctor, so if you feel concerned about what you experienced or if this starts to occur more often, please consult a medical professional. That being said, it sounds like you were having some kind of panic attack or a different anxiety disorder. According to the DSM-V, the guidebook for mental healthcare professionals, you can speak of a panic attack when you experience at least 4 of the following symptoms (I simplified some for this answer, as this answer is not meant to be used for any kind of diagnosis) > Irregular heartbeat, pounding heart and/or accelerated heartrate > Sweating > Trembling, shaking > Feeling a shortness of breathe > Feeling like you're choking > Chest pain or discomfort in the chest area > Nausea > Feeling dizzy, trouble standing on your feet, lightheaded and/or about to faint > Sensation of unreality, about to be detached from yourself > Feeling of loss of control, "going crazy" > Fear of dying > Numbness > Chills and/or hot flushes That's quite a list, but remember: the DSM-V states that you only need to have 4 of these to speak of a panic attack. You already listed dizziness, feeling like you're about to pass out, sweating and the fear of dying. That's 4. However, some symptoms of a panic attack can also point to different kinds of anxiety disorders. It is therefore important that you don't see this as a diagnosis and consult your doctor if you are worried about your wellbeing. Only a doctor can make a diagnosis.