Taking H in between subs and buvidal

Hi, I just started suboxone/buvidal today and I have taken 4mg split up 3 and 2 hours ago (so 2mg 3 hours ago 2 mg 2 hours ago), and then they followed it up with a weekly buvidal shot. I know the consensus will be not to use H at all but I am genuinely curious how the suboxone and buvidal shot work differently.

As far as I understand it, if I was to use H in between taking 4mg of sub and the (i think they call it) 8mg buvidal weekly shot, I would get no effect, but I wouldn't get PWD's either, is that correct? Rightfully, the nurses at the clinic said either they didn't know or that it would send me into PWD's, but I really think they don't actually know and I'm wondering if anyone here understands how these medications work differently in that regard.

Just a disclaimer: I'm not going to use H or any opioid today, I just want to understand the pharmacology of how bupe works better I guess. Despite this, I really don't feel as good/normal as I expected to feel today. I've taken subs in the past and it completely took away withdrawal at even lower doses than this before, so it's strange to me why this time I still feel restless and somewhat unwell still. It's like the level of withdrawal I was at when I went to the clinic this morning (which was mild, but noticeable), has just remained the same and not gotten better/worse which, by now I would definitely be freaking the fuck out going the full 24 hours it has now been. So obviously it's had an effect but less than I expected I guess. This is in Aus btw, so likely no fentanyl is in the dope I have been using.

Hope this isn't against the rule's. Not trying to derail anybody's recovery at all, including my own.