I KNOW IM PREGNANT

I know this sounds crazy but I have a really strong feeling that I’m pregnant. I had 3 days of very dark brown spotting about 2 weeks ago. No AF. I am really nauseous and I keep getting like a rusted taste in my mouth. My test keep coming out negative but idk I have a gut feeling I’m pregnant. Anyone have a situation similar and did turn out to be pregnant. I really hope I’m not just making this up in my head. Any advice would be appreciated.