Hello and welcome to EmpowHer,
None of the situations you described can cause pregnancy. You need to have intercourse where the man ejaculates into your vagina without any use of birth control in order of pregnancy to occur. Irregular periods can happen for many reasons besides pregnancy.
Below I have attached an article that could be helpful for you. It talks about different causes of irregular periods.
https://www.empowher.com/menstrual-cycle/content/think-youre-pregnant-10-other-reasons-your-period-might-be-late
Faith
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Hello and welcome to EmpowHer,
June 18, 2016 - 10:40pmNone of the situations you described can cause pregnancy. You need to have intercourse where the man ejaculates into your vagina without any use of birth control in order of pregnancy to occur. Irregular periods can happen for many reasons besides pregnancy.
Below I have attached an article that could be helpful for you. It talks about different causes of irregular periods.
https://www.empowher.com/menstrual-cycle/content/think-youre-pregnant-10-other-reasons-your-period-might-be-late
Faith
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