Dear, you sound incredibly mixed with psychotic features & I really hope you are able to get some proper help soon. Though you are in a bad spot with your BP, I cannot blame you for the angry uprisings with your SIL... Pent-up frustration can often lead someone into an episode they may not have otherwise had. I know essentially how you are feeling & how hard it is to want to feel better, yet either being too distracted/apathetic/dysphoric to want to do anything about it. There has to be something that you can do that will keep you distracted, but won't overwhelm your senses...
Also, nomenclature is the process of giving something a name or the area of study surrounding names. "Binomial nomenclature" is something having 2 names, such as the genus & species titles for all animals/plants/insects/etc.