Hello, i would like to ask for opinions, guesses and if possible good advice on this matter, and i thank you for your attention.

I was in the computer playing games when i hear my mom screaming while she slept, but it sounded like she had a pillow on her face so the sound was muffled, i go there and wake her up, she is really scared, terrified, and says : i thought it was you who was here,
basically she explained that she feels this weird feeling all over her body, and can't move
she also mentioned that one time she had a pillow on her face and she claimed that someone or something was trying to cut her breath, she can't "speak" she says because it sounds really weak( again she says: she realizes its weak whisper like if she is unable to scream for help ) yet she cries and talks and i can hear her well enough to get to her , she says she can't move but im not really sure she can't because i have to "open" her fetal position because she is so tense, rigid muscles and stuff, im guessing she is actually making strain on the muscles or something because she is scared. i've ruled out sleep paralysis because obviously she can talk.
I'm sorry i can't povide more solid information, but hearing my mom cry whil she sleeps a hole bunch of times doesnt make me take an obvervatory stance for a moment while she sounds like she is being murdered or something. Would you please tell me what you think and how to possibly fix this.

My mother says she won't go to a doctor, im going to be honest here, she problably thinks its some evil spirit, and althought i dont disrespect such things i am afraid she is just suffering from a sleep disorder derived from stress, of which she has plenty, how to convince her to go to a doctor would be a nice answer to this.

To finalize, this has been happening for quite a while she says, i suspect a few years, my mother is 46 years old.
Thank you again.