What are early pregnancy symptoms?

Fan Question

We have been trying to conceive the last two months. My period is late and I’m testing negatives on tests. Before I knew I was pregnant with my son, during the early weeks I would smell EVERYTHING and get nauseous from the smell of the kitchen sink. Well, today I can’t even go near the kitchen because I strongly smell that “smell”. Could I be pregnant? Could it show negative because ovulated later than I thought? Help!