In March I had protected sex twice (on the 4th and on the 7th). I, then was stressed out because my period came two days late (on the 23rd, when supposed to be the 21st). In April, I had sex on the 13th and my period came early on the 18th. After my period, I started having severe stomach cramps and constipation. Now it's May. I had sex on the day I supposed to get my period, the 17th, but here it is the 24th and there is still no period. However, I'm getting cramps like it is coming. In this time span of three months, I have taken maybe about four HPTs and they have all said negative. The last one, I took two days after my period was supposed to show at Planned Parenthood and they told me "definitely negative". Am I pregnant?