Not getting a single minute if sleep.

Hello doctor, im 34 years. Im not getting proper sleep at nights. This makes my whole day tired. This makes a huge difference of quality of my work. I keep my eyes closed all night even though im not getting proper sleep. I could recall all events of my past which is really unwanted during this time and it continues like a movie...i can hear all sounds around me. Sometimes in the evenings i feel like sleeping but I won't sleep.. if i sleep very rarely i sleep like hell. That time i feel very tired and body pain too after i wakeup.. This continues everyday.. Im currently taking salfasalazine (saaz) 500mg for sero negative arthritis one at night. Dont know how to over come this issue. Being a mother of two kids feels very difficult to give my best output.. Need your guidance experts..What about sleep therapist?