So super late!

My period is now 25 days late! I've never been this late before EVER! I had sex in February 6. Then a week later I had spotting for four days. I told a home preg test and it came back negative. I went to the dr and took another pee test and that too came back negative. :-/ I'm worried something's wrong with me. I have another dr apt in three weeks! Which is WAY to long. I have some symptoms like tender boobs cramps  and nausa. Any advise lady's?