unfortunately i have no advice, just here to say, yeah i don't heal for junk anymore. bug bites, you know those random scratches that come from no where, same with bruises for me, healing cuts and fading bruises can be there anywhere from a month (on avg) and i had one bite that lasted for like 2 almost 2 1/2 (prolly partially do to mindless scratching) but anyway, talked to my doc a while ago bout it and he kinda shruged his shoulders, which started me doubting his medical liscense
but yeah, i'd say try anything you can lol, i still have scars from mesquito bites from almost 3 years ago!! this stuff is crazy, well anywho, 5am babbling, good luck with ur bugs