My gf missed taking her birth control pill for 3 days she started taking it again will it be ok for us to have sex in a week? We haven't had sex for 10 months and she just started again today

Oral . Oral birth control pills (bcp) prevent pregnancy by suppressing ovulation, in other words preventing the release of an egg from the ovary. Missing 3 days of her bcp may be enough time to activate the release of an egg and therefore it is possible that pregnancy could result - you should now practice barrier protection, e.g. Condom or diaphragm with spermicide. She should finish the current package of bcp, leading to a period. Then she should resume taking the next month's bcp - she should be back on track for protection against getting pregnant.