 [ Symptoms ] how long after a collage is done can u have sex i had one a week ago and im 19 weeks pregnat [ Disease ] hi well that means you had sex 5 months ago so where was you then and what you did a week ago would not mean anything but you must love having unprotected sex then unless you guy or guys by real cheap condoms so from 5 months ago work out where you was an who you was with its your only way good luck