My husband and I have been ttc baby #2. For baby # 1 we had an IUI with clomid and trigger shot and were successful. This time around we tried one cycle with clomid -negative. Then we tried clomid, trigger shot, and two IUIs - negative. This month we tried clomid with an increased dosage, trigger shot and one IUI. I experienced cramping around the time that implantation would have occurred but the hpt was negative. I should have started my period yesterday. Is there a chance I could be pregnant even though the hpt is negative.