Trigger warning: rape sexual assault etc etc

Ok I’m here for advice girls.

I am 17 years old and On December 15th 2017, i was in a situation that I cant tell if I can label it rape.. or sexual assault or what. Let me explain the situation and then the reason I need advice :

Situation;

Well on December 15th 2017, i went with my grandmother to the spa to get my nails done while she got a facial. This was an all female only spa and so I felt comfortable there.

We went in, and I found out they were out of the acrylic nail stuff and had put the order in and wouldn’t come in till next week. So I was like cool so I’ll just hang out while my grandma gets her facial.. my grandma felt bad and peered pressured me into getting a facial..

I went in, changed into the robe thingy they have and me and my grandma were out right beside each other so we were talking the whole time.. mid way thru (the same lady was doing our facials) my grandma fell asleep, and so the lady put on a face mask on me while she finished her up. 10 min go by and she wake up and finishes up and is going to go get her hair done..

the lady leaves and another lady comes in and says she will take care of me since the other lady is taking care of my grandma.

She takes off the first mask and 20 min of weird facial-y things later she puts on this weird clay mask, that covers my eyes and my mouth. Only leaving holes for my nose..

I dose off a bit at this part, cuz she starts massaging my head.. and i then wake up to feel her hands on my arms.. and then on my chest.. and I try to push her off but she pushes them back down.. and tells me to calm down, and along the lines of this is part of the facial...

I start freaking out and I feel my whole body shut down. I couldn’t move. I was so scared.. suddenly I feel her hands reach my waist and I quickly pulled my legs towards my chest stopping her..

Then she moves her hands up.. and continues to massage my head... at this point I’m trying to figure a way out of this situation. I tried talking but the mask was so hard it wouldn’t let me move my lips. Then, she asks me if I have to use to restroom.. and I nod my head thinking maybe the mask will come off or something and I’ll get a moment alone to gather my thoughts together.

Then she grabs my arm and pulls me towards the bathroom.. (I can see the bathroom lights thru the-mask)

Then I suddenly see the lights turn off and her on me.. I push her off and she grabs me and starts... doing things to me... and I push her off again.. then she helps me back to the seat. And then she goes on saying “u made me think it was ok” “it’s ur fault” etc etc etc. and I believed her...

She takes the mask off and I kept my eyes closed cuz I was scared to open them and see it all be true. I wanted it all to be some twisted nightmare. But it wasn’t. I change back.. and walk to my grandmother. I had to act like everything was ok.. I had to tell her I was fine.

She made me think it was all my fault. She made me think that it was all because of me.

I even remembered going to the restroom. Locking the door and just crying. With my phone in front of me debating whether I should call my mom.

My mom and I have a really tough relationship.. I have messed up a bunch of times, and it’s just trust is something that is rare in our relationship and it’s my fault. But at that moment I didn’t know if I should call and tell her.. whether she would believe me.. or she would just yell at me for being a drama queen.

I wanted to call but I also at that moment thought it was my fault.

For months I never told anyone. Only 2 friends of mine know because they went they something similar. And they all told me to tell her, but they don’t know the relationship I have with her..

Now it’s been almost 6 months. I know now that it was not my fault.

It isn’t my fault.

But idk if I should tell my mom. I want too.. but idk if she will believe me, esp after the fact it happened so many months ago..

Idk what to do..

How do I tell her?

Should I tell her?

What do I even say to her...?

Right now I’m in exam season, so I plan to the moment my exams are over and I’m at home for the next few months..

But either way.. I still need to prepare. I still need to get my thoughts in order

I still have to decide whether I tell her.

So what do u think.. if u read this far, kudos to u..

the few people who have read this.. what do I do, what do I say. Should I even bother?

plz do help me.

Thanks..

Hmu on the comments to let me know what u think I should do