Hi, Thanks for the query. Nausea, vomitings, bloating sensation etc can be seen in early pregnancy. But having green colored stools is somewhat uncommon and not related to pregnancy. Altered color of stools can be seen due to intake of medicines like iron supplements, indigestion, interstitial bleeding etc. If you had unprotected intercourse around the time of ovulation, there is possibility of pregnancy. As your periods got delayed, once go for pregnancy test. If the test comes negative, consult gynecologist once and get evaluated to find out the cause for delayed periods. If she recommends once go for stool examination. With this examination the possible cause for your problem can be identified and treated. Take care.