So I had spotting once on the 24th of June-my period is suppose to start today 6/29. My breast are tender and I am getting hot flashes it seems. I think I could be pregnant because I have NEVER had spotting like this before and I have been light headed. It was very light pink and ONLY on the toilet paper. I took a pregnancy test on June 28th, it was negative. When should I try to test again? and does it seem like I could possibly be pregnant?