I had sex during ovulation a couple times. Ovulation was about 2 weeks ago. Sense then I have been experiencing sore tender boobs, nausea, certain smells turn me off, I have been moody. This morning I woke up to light cramping and I wiped and there was red blood not a lot. I am still cramping in my stomach and my back and still bleeding red. Is this implantation bleeding or period. ( I was 5 days late on my expected period.)