hi, for background i have anxiety and depression and have been ‘tentatively diagnosed’ with cyclothymia (a less extreme thing similar to bipolar II i think)

i keep having intrusive thoughts that are really distressing to me, from seeing deep cuts all over my body, to being hospitalized again, to seeing my boyfriend cheat on me or cry or tell me he hates me. i don’t know why i’m having them or how to stop them and it’s making it hard for me to sleep because my mind runs wild with just awful things happening to me in almost a montage.

does anyone else have these? what could be causing them? and if there’s any way anyone can help me stop them i’d appreciate the help