I have extreme fatigue, canker sore, sore throat, congestion, low rbc count, low mono count, high lymph count. No fever or swollen glands. Is it mono?

No, not necessarily. It can very well be any viral infection other than mono, would give the same picture, the low RBCs count isn't related, it can be due to anemia from any cause, in your case could just be heavy menses. Confer with the doctor who ordered the test or get a HealthTap prime consult if you wish. Other than that rest, fluids, salt water gargles, pain killers till that bout is over, wish you wellness.