I agree with @luciusstorm follow your heart and let it guide you. Personally I would keep writing and then edit things together later. I struggle to get started writing on my story so once I get into the flow I keep it going until it runs its course. If the muse is in you it's far easier to remove text later than it is to try and rekindle that creativity if you don't happen to be feeling it when that time comes. At least that's how it works for me. As I'm going along watching my sims I'm also thinking about how I would write up what I'm seeing and if I really feel it I'll stop and write or jot down thoughts.
