Can i be pregnant if my period was last week?

Yes, it is possible.: Some women do have bleeding around the time of their expected period even when they are pregnant. Usually the bleeding is abnormal in some way but not always. If the bleeding was not a typical period or if there are unusual symptoms such as cramping, bloating, urinary frequency or others you might want to allow a few days to go by and repeat the test or get an evaluation by your doctor.

Probably not: If u had a normal cycle, most will ovulate about day 14. If it is before day 10 then it is usually very hard to achieve pregnancy. If your cycle was light then that could be implantion bleeding. My advice is for you to just do a pregnancy test.