Did I miss my chance 😩

Ashley • Wife 6/8/13 Stepmom, Frankie 12/5/18
Good Morning Ladies!! So quick question and it might sound kind of dumb...but I'm thinking I may have missed my chance this month...so I took an OPK yesterday morning and it was slightly darker than the one the morning before, also yesterday morning I felt slight cramping on my right side really early around 3:30 am, took the kit when I woke up and was like oh ok. Had intercourse last night thinking it was the start of fertile time. Took and OPK again this morning and nothing!!! Does this mean that I missed my chance this month??Â