Could this be it?

I'm not sure where to start but I'm also not aware of what it's like to be pregnant so could someone please help. Okay lately I have been feeling very nauseous. Last month my period was almost a week late and I know that could be because of other reasons, and the other morning I woke up and just started vomiting. Every time I eat I feel like I'm going to get sick to my stomach, I feel really tired after not really doing anything. I stay hungry but I can't keep the food down. I don't know I guess I just need to get a pregnancy test ASAP.