Yes. I was sexually abused by my brother, who is 5 years older than me. Sibling sexual abuse is not a topic often spoken about, but the affects can be the same as being abused by a parent. I went through my whole life thinking I was the only one. I am a drug addict, I SH, I have chronic sui thoughts, I've attempted sui twice, I have c-ptsd (this result triggered by a combination of the csa and the physical and emotional abuse which drenched out of my family), I have anxiety and depression, I have a sleep disorder, I can't hold down a full time job. I'm a mess, but I have to constantly pretend I'm okay. I don't trust anyone. I barely trust myself.
I'm very sorry that your brother did that to you

You are not alone. Counselling has helped me enormously - do you have a counsellor or therapist?
It may very well be triggering for you but, if you feel up to it and want to know more, google 'sibling sexual abuse' there are a number of articles and websites offering information on this form of abuse. That's how I first started to feel less alone.
Feel free to pm me if you want to.