spotting during start of fertile week CD 11

Sarah • Mom to a toddler girl via ivf. Pregnant with baby number 2!
Been having this light brownish clear spotting past couple days. I have never had this before. No spotting in between periods even during the past 2 years we've started TTC. Could this just another new symptom or my cycle? I heard it could be break through bleeding of an egg coming down the falopian tube/normal ovulation, in which case we need to get BD! but just want to make sure it's not something unhealthy or to be concerned about.. also wondered if it's at all possible this is indicative of a pregnancy. Thought for sure we conceived last month but then I got my period. I know it's different but my mom had her period 2x before she knew she was pregnant with her first. 
Ovulation test or pregnancy test? Thoughts thanks so much!