It is highly unlikely you will get pregnant based on the above scenario.
Nope. You can still get pregnant. It is less likely, but can happen.
That's the most likely explanation.
Most likely no, but however it is possible.
Very unlikely.
You are not likely to get pregnant while you're on the birth control pill.
Not likely.
not likely
Not very likely but definitely possible. Take a test just to be sure
No
they havent made that part yet but they are working on it and will most likely have it by summertime
A women can most likely become pregnant when she is ovulating.
If your question was purely about which would be more likely, it would be the regular partner, simply due to probability. The more chance a single person has to get someone pregnant, the more likely they will. HOWEVER, in reality, things don't really work that way. A one night stand CAN make someone pregnant. There's the matter of if protection was used (condoms, birth control pills, etc.) and if the person ejaculated within the vaginal cavities. But to wrap it up, it's more likely that the regular partner is the father but the only way to be sure is get the chold tested, and prepare for the worst and hope for the best.