For some reason the microbial life in your soil isn't buffering the pH correctly probably from overwatering ever so slightly up to two or three weeks ago . If you don't have access to pH things you probably don't have access to anything right ? If you did have access you would be looking for beneficial bacteria, enzymes or humic acid (buffers to 6.5). Since you don't what you want to do is let the pot dry a bit more than usual then water very carefully with molasses, hopefully the sugar will feed her beneficial bacteria, make sure you get rid of compacting of the soil just by squeezing your fabric pot. Hope this helps 👊🏻