I actually (19f) woke up with sperm on my face plus my mom (45f) wont belive me

Yesterday early morning I (19f) woke up to semen all over my face and pillow. I didn' t know what to do but i just went to the shower and cried for 2 hrs then washed all my bedsheets and pillows. Im not sure if that was a mistake or not since if i didn' big t wash them i might have got proof rn but in the minute i just wanted to be clean.

Around the end of the day I broke down and confided inside my mom. She helped me settle down and was patient about this but suggested I most likely just dreamed it or even mistook what it was. We tried telling her that i didn' t dream it and that it was definitely what i thought it was. But she just told me to go relax and try and forget about everything.

I feel like im heading crazy and im on edge around all the men in the house now. Im not sure who it could be and that is producing me feel unsafe close to all the men. Right now the men in the house are, dad (50m), my brothers (22m, 24m, 27m) and the sisters boyfriend but i am aware its not him as he is ftm. Im frightened in my own home and my mom wont belive me but I have nowhere else to visit. All my friends have move or are on vacation and any other family live! from state. Is there a way to encourage my mom im telling the reality.

Edit: My sister is definitely home from work now. The situation is worse than I though. I talked with my sister, she is with me now and will stick with me in my room till we can both get out of the house tonight, we will go stick with her bf for the time being. The girl told me something nearly similar happened to her about a month ago and she told our own mom and she told her exactly the same thing to her that she do me. I dont believe in our mom anymore, personally i think violated and angry. My sister didnt even visit me because mom gaslit her just like she do me. I want to just scream at her. I will not be replying for a while, apologies. me and my sister are packing and want to simply comfort each other and get away from home asap. Thank you everyone for that advice.