i have no idea about allergies but i know about thrush. if the thrush isnt deep in your ducts i would try to use homeopathic remedies rather than drugs..
rebecca haworth has written some interesting stuff about the effects of drugs prescribed for thrush..worth a read.
it is pretty tedious what you have to do but after a few weeks (yes i know thrush can be really stubborn as you pass it back and forth between you and baby even if baby has no symptoms and it can return).
things to remember--thrush -is yeast-loves alcohol, sugar (sweet breast milk) and warm moist conditions. yeast is everywhere.
rinse your boobs with a vinegar solution and air dry after every single feed - try sleeping with nothing on them and just a towel underneath you to catch the drips! (i think air exposure is one of the best things i did to get rid of mine). if you have a private garden - get your boobs in the sunlight - good for killing yeast.
take probiotics and vitamin tablets daily and eat as little sugar in your diet as possible- making this change can keep thrush away for good.
use grapefruit seed extract )youll have to check re allergies). you need to dilute it and then swab nipples and babies mouth as often as you can remember.
i have bought some non milk based probiotics (natures sunshine ordered of tinternet - i think its carrot based) for my baby and i open a capsule, empty the contents and rub a bit in her mouth a few times a day before a sleep.
change your breast pads as often as you possibly can - if your boobs are away make sure they stay as dry as poss.
thrush can be on babys dummy/your clothes/breast pumps etc so anything that comes into contact with babys mouth or your milk, like your bra, needs cleaning in the wash at 60 or left in milton sterilising solution for 15 minutes (milton kills candida albicans).
it can be really painful so you have my sincere sympathy! as i say i dont know about allergies but if you look into some of these suggestions like the non mlik based probiotics (most cpasules contain lactose so you have to check carefully). hope this helps,
also dont get down if your symptoms get worse before they get better -you have to be consistent with the cleaning and drying routine if nothing else because it will take a while to get rid of and you have to carry on with the treatments 2 weeks after its gone. -
good luck xxx