Could you get pregnant a week before period?

No if you have 28 pe. No, not if you have a regular 28 day cycle the ovulation would have occurred on the 14 th day +_1 day, and the next few days to the 28 th day is considerably safe .The last 14 days after ovulation is said to be more constant than the first 14 days and these last days are considered safe period but you have to know your body very well and that your menses is every 28 days for this to work.