Ugh, I feel dumb!! I think I blew it!!

This week is my ovulation week and I have been taking antihistamines! How could I have not thought that through?! I have only taken two doses, and it says to take them every 4-6 hours. I took one dose Thursday and one on Friday. Today is my peak day! I hope I still have a good chance. Ugh! I have been wondering why I have been more dry than usual, and I am still waiting for my Ewcm :(. Ugh!!