Currently going through an agoraphobic phase where I can’t leave the house and when I do , I’m dizzy, hot and feeling like I need to pass out

I for once in my entire life want to go and enjoy something fully . I have a concert in a few weeks and the thought of it terrifies me and makes me want to sell my ticket . I’m terrified of crowds, my ticket is barricade by the stage so the loud noise, and of course I’m terrified of standing because ill pass out 

I have passed out before with anxiety, I got right back up and was okay. Is this how everyone else’s is? Where you go down and can get back up reasonably easy? I just want to expect the worse and know I’m okay if it happens 😅 

I’m tired of living this way, and I really want to go have fun but of course , anxiety and dizziness is just flat out wanting none of that.