You may want to consider changing bottle size or brand of the NAC you have been ordering.
I ordered 3 bottles of Doctor’s Best NAC Detox Regulator from them the first of the month and it came immediately.
I’m miffed because they charged me for a bottle of XClear and then later told me it was out of stock, and refunded the charge. If I had known at the time I would have ordered from someone else, now I have to wait to come up with enough for a minimum order somewhere else.
You may want to consider changing bottle size or brand of the NAC you have been ordering.
Re: XClear, I bought some, and had problems taking it, but am still gamely trying to get myself used to it, since I bought it and hate to let it go to waste. I have to take it about an hour before I need to do anything, as it takes that long for my sinuses to settle down. And that’s just with one squirt in each nostril - I think they recommend up to three? Yikes! (What was this stuff supposed to be good for again? I forget!)