Hi Rose,
Well, it seems you have mania and psychosis mixed up. Mania is elevated mood often euphoric but also can be dysforic (which can also be called mixed mania or active depression.) Basically, mania is racing thoughts, pressured speech, risk taking behavior, lack of sleep yet not feeling tired, and elevated sense of self (which is grandios thinking,) but it doesn't necessarily mean thinking you're God or whatever. But it is like when you're depressed you think you can't do anything, and when you're manic you think you can to everything! And it will be awesome!
Psychosis can happen but isn't something that happens for everyone with bipolar.