Questions

I had a MC on April 23/14 
​I had my period the following month on May 23 - 26/14
​Didn't get my period in June 
​Had very faint pink spotting July 3-8/14 
​I haven't received another proper
​Period since. 
​Went for an ultrasound and blood work July 11 ; BW came back negative and ultrasound didn't show anything. 
​Any suggestions? Should I take a test?