My gf has irregular periods. She had her periods from 3 jan to 8 jan. According to her last 3 cycles her cycle would be of 25-29 days. On 24 jan we did not have unprotected sex but when I ejaculated there was some sperm on my hand and I fingered her with it. I gave her unwanted 72, 23 hours after this (25 jan) and she had spotting on 29 jan and heavy bleeding on 30 jan. She had bleeding from 30 jan to 2 feb and spotting on 3 feb. It is like her periods because she had pain and heavy bleeding and was like on the expected time of periods. She had very little spotting (2 3 drops) on 10 feb. She only had headache and nausea for a day on 12 feb and 13 feb. We did urine test on 15 and 18 feb and both were negative. My question is does heavy bleeding rule out pregnancy? Considering the above dates and factors was it a safe day? What are the chances of pregnancy now? She had little symptoms of pregnancy like headaches, mood swings, little nausea which can be caused by unwanted 72 but can unwanted 72 cause such symptoms until a month of taking the tablets or is it pregnancy symptoms? Please answer my 4 questions in detail because we are stressing out.