Suffering from PTSD

Helloo!!
It is a continuous challenge living with posttraumatic stress disorder (PTSD), and I'm suffering from it for the past one year. My PTSD was triggered by several traumas, including a childhood laced with physical, mental, and sexual abuse, as well as an attack at knifepoint that left me thinking I would die. I couldn't be a normal person after that attack. For me, there was no safe place in the world, not even my home. I went to the police and filed a report. Rape counsellors came to see me while I was in the hospital, but I ignored them. For months after the attack, I couldn't close my eyes without envisioning the face of my attacker. I suffered horrific flashbacks and nightmares. I was afraid to sleep alone in my house. Each time I used to wake up even if I hear a small sound. I obsessively check windows, doors, and locks. I lost all ability to concentrate or even complete simple tasks. Actually, I was a social person love to make friends but after that attack, I stopped trying to make friends or get involved in my community. Seeing my behavioural changes my friend took me to the nearby clinic in British Columbia and the doctor over there diagnosed PTSD in me. He suggested taking medical marijuana treatment ( apollocannabis.ca/british-columbia ). I don’t have much idea about medical marijuana. Can someone share your knowledge on this? I’m tensed thinking about its side effects.