Pink CM after AF CD 8

Am
Ttc for a few months, had an ectopic and surgery in April. Just had second AF since surgery. Normally my af is 3 light/med days and one day of spotting. This last month AF was all spotting (3 days) except for about a half a day of light/med flow. 
AF ended four days ago and today I had some very light pink cm when I wiped. I took an opk and I got a faint line. 
Any ideas? Really hoping for a BFP soon.