3 really important questions...please help
im 15 years old
1. for the last 2 days or so, i've been feeling like i can't think clearly. Last night, i almost felt like i completely got lost somewhere for a few seconds, almost feeling like my brain may have shut off or something. When I was in the shower last night, i had thoughts about how i may be going mental o something, but i started thinking about something else and i started to feel better mentally. Today, my Dad is at work, but i couldn't really convince myself for some reason that my dad is at work. doctors have told me within the last 2 months or so that i have stress/panic attack related issues. Is this thing about my mental health dangerous? what can i do to get better
2. I've been notiing for like a month now that i'm starting to fee kinda scared when it's dark. Why is this happenening, and what can i do to make myself ffeel better?
3. I had my heart examined thoroughly on Thursday, as i went to a heart specialist and got ultrasound (i;m prety sure it was ultrasound) and another test done where they examined everything i my heart. everything turned out to be good. My doctor later asked me questions about my heart later, and he said everything is good. However, i forgot to tell him like 3 things about my heart: there's some type of sound in my chest/heart sometimes although not often (also happen when i yawn sometimes), heart stopping for a second, and how in the past i've woken up at night with a weird feeling in the heart, like my heart is getting scared or something (the eeling when u get scared). Is this anything important, or is my heart fine?