I'm trying to conceive however it's been difficult due to risk factors regarding chronic pain issues. My period is 5 days late as of today. I've taken 3 home pregnancy tests that were all negative. I've also taken daily ovulation predictor tests that were all negative. For the last week, I've had severe back pain, thick egg-white like discharge, lower abdominal pain that was only on left but is now on both sides, breast tenderness, decrease in appetite, and certain smells make me nauseated. I usually have PMS but haven't had signs of it or my monthly cycle. Could I be pregnant? What should I do?