It's been 7 days since the first day of my period which only lasted 4 days, can i get pregnant now?

Fertile time: usually about 12-14 days from the start of your last period.

Timing: Ovulation usually occurs about 14 days prior to next anticipated period. To optimize chances of pregnancy can have sex beginning several days before ovulation, at time of ovulation up to a couple of days after. However, if you don't wish to become pregnant - you may be at risk & should use protection.