need advice! no af, bfns. what gives?

Stephanie
Good afternoon ladies! 
I am confused
I am usually very regular with my cycle, 28 days. 
Have been using opks, charting bbt, used preseed AND started first round of clomid 50mg this cycle.
Ttc 5 months for first baby.
I had a tiny bit of spotting once yesterday when I wiped after peeing, and it was very light pink... nothing since. 
All hpts have been negative. 
Anyone else in the same boat?
Does clomid delay your cycle? By how long 
Just curious if anyone has had this experience before. 
Thanks so much! :)