Какой союз или соединительное наречие подходит чтобы соединить эти два предложения:
Everything should fit in. I am on the wrong track.
and, nor, neither ... nor, not only ... but (also), as well as, then, moreover
or, either... or, else, or else, otherwise.
but, while, whereas,nevertheless, still, yet
for, so, therefore, consequently, hence, then, thus

А для вот этих 2-х ,наверное "and" или "so" :He looked at me significantly. We changed the topic at once.

сойдёт

Everything should fit in (so, therefore, thus) I am on the wrong track.