I doubt that I’m pregnant but I still think I might be ?Need advice PLEASEEE

This past week I have been feeling extremely nauseous and tired and the past three nights I have been up puking my guts out ... I just ate whataburger about an hour ago and threw it up about 3 min ago ... i also broke out with cold sores this past week and I’ve never had them before well at least i think they. Were a cold sore they looked like a pimple and I’ve been breaking out on my chest and my back a lot when i normally have clear skin please help me better understand what might be going on is this normal ? I don’t feel sick but i just feel like i need to throw up all the time& also if i test will there be a high chance that my hormones are strong enough to show up on a test since I’m already throwing up ?