Over the weekend on Sat. I started having diarrhea and then vomiting .My thoughts were that it was a 24 hr. Virus ,but my fiance thought that I could be pregnant.So he went to the store and got First Response .The first try showed 1line and another thinner one.That was enough proof for him but I wanted to try again to see if 2 solid red lines would appear.Well 2 same size lines showed on the next test,so I am now led to believe that I must be pregnant. My period was due to start on Monday and it did not ,but it did start today with cramps .I do not understand why the test read positive and also could I have had a miscarriage??? My cramps are strong ,but when I eat something salty they are strong. Because I thought that I was pregnant I ate some popped corn today so there is the salt.So what do you think ??? Was I pregnant ,could I still be ? Was it a false pregnancy or a chemical pregnancy?Do you think it would be safe for me to take some Tylenol for my cramps???? Thank You for your time .Angela