I had my tubes tied and spotted for three days could i be pregnant?

Unlikely after tubal: It is rare for a tubal ligation to fail, but if worried, one can do a pregnancy test. A urine pregnancy test gives a reliable result 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon, and thus lead to a repeat test.