Got phy wid gf.usd condom.last month she got periods on 21 bt dint had til now.v bcame phy on 16 this month and its 24.can she conceve how to chek?med

Pregnancy test!: I'm glad you're using condoms, but it would be a better idea for her to be on birth control pills too! if she had a period 5/21 and 6/24, that can be normal, as long as the period is the same amount and duration. As long as you used a condom on 6/16 when you had sex, you should be ok; but if you're worried, you can always wait a couple of weeks and then have her check a home pregnancy test.