Someone please answer

I've asked in different forums no one has responded I'm hoping someone here can help me? I'm 29-30 days cycle, I ovulated according to answer strips cycle day 14. My lmp was August 17 so I was suppose to be get af on the 16th or 17th. It came on the 10th and ended on the 13th I had taken pregancy test twice right before af appeared they were negative. The 14th I woke up feeling sick, migraine and food grossed me out no period and then today again same feelings except now I went to pee and was surprised to see when I wiped there was light blood almost pink or rusty like just on the paper and I wiped a few times to clean myself and it was there. Has anyone ever gone through this? Is this old blood or wth? I really do feel sick though and I've been taking Motrin 800.