First off,
don't worry about giving off too many "tells" at the
microstakes. The common
microstakes player doesn't pick up on many tells, and they routinely fail at exploiting whatever information they might pick up. So you
don't need to worry about balancing your
range, or anything like that at the
micros. You just need to worry about making the most +ev play with your given hand, and the given opponent.
Second, the longer you are around poker, the better you will start to understand
variance and how it works. You sound as if you expect you will always win when you play
well. But that isn't the
case. You can sit there and play perfect, and still have a losing
session.
Things you should consider that will determine whether you should continue playing or end the
session, or move tables, would be things like (1) Are you playing your
A-game? (2) Do you still have an
edge at the table? (3) Do you want to keep playing?
If you aren't tilting, and you still have an
edge at the table (it's still a profitable table), then you can continue playing. You might continue to lose, but that would just be
variance at work.
If you can't handle those loses, you are probably underrolled, or need to work on your emotions relating to poker.