what is wrong with my cat??

i have a female cat that turned 4 in march, she’s never been the most affectionate cat, but she has her moments.

the last couple of weeks shes became super aggressive out of no where. like if i even walk past her she gets extremely mad, attacks me and scratches me and then starts hissing at me.

most nights when i’m in the bathroom getting ready for bed, she comes with me. when we go back to my room she immediately runs under my bed, and when i’m making my bed i have to walk around it to fix the blankets yk, and when i do this she starts hissing, jumps out and attacks me again.

idk what to do. my friend suggested that it could be from her not being spayed, but i wanted to get other opinions as well. if you have any suggestions or ideas please lmk this is driving me insane and i can’t even be around her anymore.