sleep paralysis??

my grandma passed away a year ago, a month after she passed away I experienced sleep paralysis for the 1st time in my life. Thought that's the end but no, it keeps on happening. I sometimes hear a groan while I can't move so I always pray to wake myself up. Terrified to sleep, so I resort on wearing rosary on my hand, which is a great help. But sometimes I forgot and the nightmare always comes back.
And Last week I forgot again but this one is so bad cuz I thought laying on your back can contribute on having sleep paralysis. This time I'm on my side when i fell asleep, facing my wall when the paralysis happened and felt something hugging me from behind. I prayed three times and broke free in sweat.

Have you all experienced such terrifying things too?