std or bacterial infection.

After having sexual relations with my boyfriend a couple of days later he called saying his privates itch,and that he has a swollen nymphnode under his armpit,and before then my privates itch and I had boils on my privates and eyes and have taken antibiotics for it already and no longer experience that for some time now but once in a while my privates itch mildly.and I don't know what the cause of it is,if it is as a result of using a public toilet or a sexually transmitted disease though we haven't gone to see a doctor yet we are so worried about what it is and scared of it being herpes.please what is the cause of it? But if I had a toilet infection can it be sexually transmitted?