Hi and welcome to the mone forum!
Mmmm… I understand, then, you have a few things to check out. First, if synthetic pheromones work.
For this, I would say, blatant responses to your mones would be IO. Instant Openness will open up others as easily as a warm knife through butter. It brings a torrent of gab, generally.
The other side of the coin, is in Self Effects. IO may also bring a torrent of talk from YOU as well. May bring up the confidence to just talk, though, not necessarily what’s needed for finals! 
One of the effects that I’ve gotten for a focus of attention, was using TAF. It’s one of the G13, Golden Molecules used for testing. I would suggest you take a look at it. I also find that it Enhances other mones that I’m using at the time.
The reason I do this kind of testing and combo’ing? Take a look at this link:
For a confidence boost, in general, as well as sexy vibe, IS/a would be my suggestion. Less is more with these mones, keep in mind. IS/a, to give it a celeb who exudes it’s vibe, would be like a Sexy in the way of a confident Angelina Jolie.
For a more non sexual kind of bump in confidence, IShine would be my next suggestion. IShine is a unisex mone, BTW. A comforting, vibrant and youthful vibe this one, though, when I use too much, 4 sprays or more of the Regular Strength, I’m still those things, but with a bit of a zoned out feel.
Mones have not been tested for providing focus and attention, though, I did start up a Thread some time ago about it as I would assume these would be good for finals.
I discussed Nootropics, among other things posted from many others, as a much better solution for focus, attention and memory recall.
Tell us a bit about your personality and how you found this site. Thanks, and see you around the forum.
1Alpha
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