Random anxiety attack

Hey so I so for some background context I’ve had depression before in my teen year 14-16. But recently (F20) I’ve just recently got my first anxiety attack. I have no idea how or where it came from, i woke up one day with a tight chest and was a bit scared but didn’t think anything of it but still tried making an appointment, when I tried to make it the app told me to call long story short I called and they told me I need to go to the ER as soon as I heard that it’s like this tingling took over my body and I felt like everything was going in slow motion, I just didn’t feel real. This feeling lasted for a couple days until I got medication for it. None the less I don’t know how or why I just started getting anxiety? So now after that anxiety attack I have had non stop ear ringing for 5 months… any tips?