Thanks for the query.
The symptoms you described can be seen in early pregnancy
but some women may have these symptoms in premenstrual phase also due to hormonal
Sometimes periods can be light because of factors like anemia, thyroid disorders, PCOD etc.
If you had unprotected intercourse
around the time of ovulation in previous cycle then there is possibility of pregnancy.
If so you can go for urine test or preferably blood test
for pregnancy to rule out the possibility.