reoccurring bv ?

Ive had reoccurring bv since June it’s now November and can not figure out what is causing this. I’ve been using dove deep moisture my entire life to clean myself never had a problem so I don’t think it’s that. I always change the brand of tampons each month but recently have been using tampax tampons and always pads but stopped with the pads since it was giving me a rash. I haven’t changed my laundry detergent or anything (no sex obviously since I’ve been dealing with this) The doctors can’t figure out what’s causing the problem I’m on a probiotic that i take orally once a day and then a pre/probiotic that’s a suppository once a week. If anybody has any ideas or tips with help that would be helpful

(also have been screened for std/sti came back clear)