Thank you for your query.
In the presence of an altered and light period, chances of pregnancy
are definitely there.
You should take a home urine pregnancy test within 3 - 4 days if your normal period does not occur.
Also, other causes of such altered bleeding could be stress, anxiety
, changes in weight.
hormone disorder and polycystic ovaries
also cause such a picture.
In case you are not pregnant and fail to have a normal period, consult your gynecologist for knowing the exact cause.