Ureaplasma

My doctor just called me and told me I have Ureaplasma and it’s nothing to worry about just don’t have unprotected sex until after I take all my antibiotics, but what is Ureaplasma? And what can I do to prevent it? I’ve only had sex one time so I had to get it from my boyfriend, how can he get rid of it? I just want to know everything about it I need to know