Could this be a sign of sickness?

So for the past few days, I have been extremely overwhelmed. I just found out that my dad might possibly have cancer and for the past few days, I honestly feel like I'm living in a nightmare. Nothing seems real except I know it is. I've started feeling lost, abandoned, and also sick. My mom and I have always got along but for the past couple days, I feel like she doesn't know me at all and that she's judging me. Once in a while, I'll feel nausiated and dizzy, but I haven't actually thrown up at all. I was just wondering if my feelings emotionally could be a symptom of a sickness or what not. So basically, I'm dizzy, feeling lost, abandoned, and misunderstood. Thanks to any helpful answers!