Welcome to Pherotalk Socal Lady!,
It’s nice that you already have some experience with Pheromones. 
I agree with the advice Gone With The Wind has given you and I would like to add unto it.
Because you mentioned “I’d like to start mixing/layering to get a stronger effect - but I am honestly not knowledgeable enough.” I would suggest that you go through this guide with every product that you have. This will really help you to get the best results you can and get a handle of pheromones
This is a guide on how to find your sweet spot (the number of sprays that works best for you) by Steve:
How to find your sweet spot... (How to find your sweet spot...)
I would also suggest trying some Turn Up The Heat. Although, this is a men’s product some of the women have experimented with it for a self effect and had good results from it. Here is a quick story about Turn up the heat. One member said that before she joined her husband was using pheromones on her. One day, during this time he kissed her (with turn up the heat on) and immediately her temperature down below skyrocketed. She said this had never happened before from just a kiss, so she asked him if anything new was up and he told her about pheromones.
Hope to hear about your pheromone adventures soon
ClintX2