There's really no way to tell unless you chart. Charting will give you your ovulation date and luteal phase length.
If you have an average 14-day luteal phase, then you ovulate on cd14 which is also average. This makes pregnancy unlikely. Possible but unlikely. Pregnancy is most likely to happen if you baby dance in the two days prior to ovulation (however the 2-3 days before that hold a very small chance).
However, if you are like me with an 11-day luteal phase, you would ovulate on cd17. Which makes it very likely for pregnancy because you can have sex on cd16.
It is all very confusing! Charting is the very best way to determine what is going on with your body! Best of luck.