+1 to the bounce to clips. Also whenever you get into rendering anything, save the project with a new descriptive name.
Without seeing what you are working with, if you get into working with audio clips that were not recorded at the same time, the synching process can get complex. I have recorded ideas off-the-cuff and later wanted to keep them, so have split the clips into phrases. If you CTRL-drag the right edge of a clip, you can time-stretch phrases, which sometimes works better than the overall clip (due to fluctuations in a live performance). When edited to your liking, highlight all the clips in the track, right click, and select "Bounce to Clip(s)."
The reason for the bounce to clip is that the (edited) clips you have created are "windows" into the
same audio file, but each with different "views." When you select all of these clips and "bounce to clip" it renders one new audio file (hence saving as a new project name). Depending on effects used, etc., this can also reduce CPU loading (depending on project size). I am pretty old school in keeping things simple... if it sounds like what you want, then commit it so that the computer doesn't have to process edits each time.
I am hoping that the tracks you are working with were all recorded at the same time. Questions like this are where a "community Gobbler" account would come in handy, since it would be easier to actually see what you are working with.