Emotional effects of treatment (TW)

I don't want to trigger anyone or put anyone off having treatment that would help them so please remove if this is inappropriate.

Has anyone else been left feeling suicidal by the effects of treatment on their body? For the small percentage it has improved my chances of not getting a recurrence it doesn't feel worth it, as I feel like my chances of dying by suicide have increased by 100% and I will be just as dead. In fact I now hope to get a recurrence so people around me won't have to cope with my death being a suicide.

Sorry I don't want to drag anyone down who is on this forum to look for or offer hope and support, I am just struggling a lot today and have been self harming the part of my body affected by the cancer (not severely at all though). I kind of hope no one else feels this way but I am also so lonely.