Drowning PTSD

So back in August my mom, brother and I went swimming in Lake Michigan. We are all good swimmers and have swam there and in the ocean before. This time was different. The current and waves were bigger and stronger than normal and while swimming I had my back turned and got hit with a wave, knocking me into the water. I reached for my mom and yelled for her, as she’s bigger than me, and she grabbed me but got caught in a current. I panic and yell for help, I can’t see or breath. My mom yells too and after what feel like forever, maybe only 5 mins though, a girl takes us further out and has us grab a bout. The waves kept crashing against us even harder, slamming me and my mom into the plastic and i couldnt catch my breath. I was able to step on something, which later I found out was my mom, I was able to finally see, I found shore, took a deep breath l, and late go. Right in front of us was a current that brought me to where the waves were weak and I was able to get to shore, all the while trying to catch my breath and screaming at my mom to let go. I screamed for help and people just stayed at me, a man even gave me a dirty look. Finally people went to help her and she got to shore. My brother this whole time got stuck in a small current and couldn’t move, there was no waves thankfully though. My dad was there and watched the whole thing, and later informed us that right before this they were telling people to get their families out of the water, and they didn’t. I ended up yelling at him for just sitting up there watching us. To this day I still get panic attacks from it and I can’t even shower without freaking out. Even now I’m shaking and I’m almost crying remembering what happened. It was a miracle that I made it to the beach without help, as I’m much smaller and weaker than my mom and brother who needed help, and my mom assured me that, by all reason, I should be dead. It’s so hard to talk about this as many times I’ve been told that I’m exaggerating and I tell you, the nightmares and panic attacks are not fake. I just needed to talk about this and help get it off my chest.