Could I be pregnant? Even after a negative test?

I took a test today and it was negative, I stopped taking the pill a little while ago. I had unprotected sex 2 and a half weeks ago, and not again since( my partners in the army) but I still 'feel' pregnant.. Am I just being stupid? Or should I test again? Or am I defiantly not pregnant after that negative test? I'm not due on for another 10 days( ish, the pill really messed with my periods) Someone put my mind at rest😏 thank you! 💕