my doctor said there was blood in my urine. blood that is not noticeable to me. I had unprotected intercourse days prior to that. my period is now over a week late. my doctor and I also talked about getting an ultra sound to look for a cyst. I have severe headaches, lower back uncomfortably, nausea, dizziness, fatigue, abdominal pain, food cravings... ect. what do you think this could be? a cyst or pregnancy?