If I have retinal detachment symptoms and am going to the doctor tomorrow, will conditions worsen by then?

Unclear. Need to know whether you have an rd or just suggestive symptoms to give the best answer. If you really have an rd, best to get seen asap, since conditions can worsen overnight.
Depends. If the macula (central part of your retina where most of your central vision comes from) is off already, then it won't matter much at all. If the macula is still on but it comes off by tomorrow, then yes conditions can worsen. Bottom line is, that question is unanswerable, unless we know the status and type of retinal detachment.