Lavender oil neat does give a, eh, tingle right enough shitmagnet, but if you quickly hop into the bath, or apply water in the shower, it's totally fine, and all thrush is gone in three days of doing this, just once a day. It's not bad for a little bit of initial discomfort. If you can bear it put a little bit on neat after the shower as well, and leave it there.. not everyones' cuppa, but for the initial days it's better than the thrush. I always found those thrush creams and pessaries were very tingly too - for me, canesten was very ouchy when applying -like a burning sensation..
It's worth a shot anyway, it totally cleared up my recurrent horrible horrible life limiting thrush. I am now thrush free totally 
and it cost me a slight tingle for three mornings and a tenner. Not bad really.
If anyone is unsure of how to suck up water into their fanjo, the yoga position Yddiyana bandha is the pelvic hold you're looking for. You just curl over your self and drop your head, breathe out, hold the breath out, (empty the lungs and don't breathe in) and pull up your pelvic floor, and then drop your pelvic floor fast, and pull up again, and take air in through your nose. Here's a video of it on .
You'll need to use the shower head, and fill your cupped hand to collect the water to have a reservoir of water at your fanjo, or just do it lying down in the bath - TOP TIP: do this just before you're ready to get out (if you think there's going to be a lot of the yeast colony coming out). Not very nice to have a bath with all the, eh, detritus floating around!!! A little bit yuckky. 