Could i be pregnant

I'm feeling a,lil confused, still too early yo take test but same time really anxious to know. I breasts aren't too tender but do get really sleepy during day n have been having weird food cravings but can't seem to pinpoint what exactly it is,I'm craving for. I'm hungry but when I do eat, o can't even finish what I'm eating. I'm supposed to have period this Sunday. Usually my breasts get tender n I eat like crazy before period starts. This time I don't feel that way. Oh, n I feel like I got butterflies in my stomach. What could it be