What could this this be

Truly Blessed • 👼🏼July 2017 👼🏼 June 2018 . Rainbow 🌈 baby born 2/17/20

Yesterday I was having stronger cramps and i notice last night when I woke up around 2am . I had a clear mucus with I slight bit of pink . I got my positive opk on the cycle day 10. Now I’m on cycle day 18 . What could this be