Background my ex was on BC for about 3 years then stopped in August. She got her period the month she stopped which was August 16th. We had sex three times unprotected from Aug 18-20th. At the end of September about a week late for her period she took a pregnancy test which came out negative. Another week goes by and she took a 2nd test, negative. The same week she took a 3rd test also negative. 2 days ago (8.5 weeks since last period) she took a test at a clinic which also came out negative. Today I bought a semi pricy test which also came out negative and this was the 5th test. Could she be pregnant or is something wrong with her period cycle?