I am very sorry to hear about the loss of your mum and sister. Believe me you are not alone in your grief. The reality is that you can’t take away the pain no matter what you need to feel and express the pain in order to start processing the loss.
Talk to someone you trust and express your feeling. Grief has emotional feelings as fear numbness denial confusion panic attacks and physical feelings of head ache body pain sweating shaking palpitation also you may feel withdrawal not wanting to participate in activities .
The reality is to accept the grief hold a memorial service to honour your mum and sister where family and friends meet and work through the grief by accepting these feelings as a normal reaction. Adjust to a new environment where you mum and sister don’t exist but still be connected in heart and mind by sharing stories and memories of your time spent with them also develop an enduring connection by getting new skills and new friends.
you may also consider joining a support group where you will meet others who grieve and know you are not alone they may have activities you may like to join in.
If you feel you still can’t cope speak to a bereavement counsellor you may find one online.
stay strong you will be fine.