BBT tracking confusion

Hey all. I am in my second official month ttc and have been regularly tracking my bbt before getting out of bed each morning. I know I should see a temp spike a day or two after ovulation, but I don't think I'm seeing that. I am really confused and could use some help/advice. Unfortunately, my husband and I are in the middle of a cross country move an he had to already move and I won't see him until June so we are kinda at a stand still for April and may in the baby making department. But I was hoping to make the most of this time to really track my cycle so we could be as accurate as possible when we finally are back together. Can you help me out?? Also I was curious if anyone knows if taking an over the counter allergy med (off brand zyrtec or Claritin) could interfere with ttc or early pregnancy??