Confused

Started bleeding on my pill on 10th June....came off the pill totally on 12th June.....bleeding stopped on 14th June..had strong menstrual cramps all week from 2nd July until 9th July which is very unusual for me as normally lasts a day then period starts...feeling nauseous and skin awful. Had a small bleed on Monday this week (10th July) but had stopped by the afternoon and nothing since other than the same cramping and slight nausea. Took a test on Saturday 8th July and was negative. Any thoughts???