Grey/ brown discharge and straining during bowel movements?

Tara

Woke up yes with watery brown/ grey discharge. Had a large cramp right when it started then no cramping after that. Discharge continued but got less and less over the last 24 hours. Now it’s nearly gone. Could this be from constipation the evening before? Even trying not to strain my body was straining. Oddly I had just had my 8 week non vaginal scan about 20 minutes prior to the discharge starting and everything looked good and healthy.