you have vaginal itching
and yeallowish discharge and were treated for this..
it is a infection of trichomoniasis/gonococcal/chlamydial/candidiasis
, that need to be confirmed with laboratory examination..
you need to be examined by gynaecologist and both the partners should be treated simultaneously.. later on maintain good genital hygeine..
you found ants in the used underwear, it is due to spillage of semen and it contains fructose( a kind of sugar) in it, it attracts ants.. so need not worry about it..
also should be ruled out, get one RBS and urine sugar done.. and see your physician if these results are abnormal..
wish you good health..