Pregnant?? SO confused 😫😫😫

So first of all my period is now 3 days late, and I've had some very strange symptoms. First of all my ice coffee in the morning the past few days (I'm obsessed with coffee) has been making me nauseous and I can't seem to drink it. That has made me feel overall nauseous for the first few hours of the day. I've had a much more decreased appetite and have been noticing smells a lot more. I took a test yesterday afternoon and there WAS a faint little line. So I waited until this morning and there was absolutely no line. Could I be pregnant?