weird spotting

so my husband and I have been ttc for over 2 years. my gyno put me on clomid the last 2 months and this month I have been spotting every other day for the past week. the spotting is very light and only last a couple minutes then goes away.. I ovulated last Wednesday. what could this spotting be? would it be a side effect from the clomid? or could I be spotting from hopefully something pregnancy related? any input would be great!