Thanks for the query.
If you have hemorrhoids or anal fissure
you can have spotting after passing stools. But these will be associated with pain and constipation
As just by this we cannot suspect pregnancy
, better to wait till your expected date of periods.
And if you miss the date go for blood test
or urine test once to confirm the pregnancy.
If the spotting continues or becomes severe better to consult gynecologist once and get examined.