I'm not surprised about the science being involved. Proper study of anything will produce better insight.
Don't worry too much about not getting the weight you are used to or currently desire. You are certainly strong - now you simply need to learn something new. It won't be long before last night is simply a memory you will laugh about.
Keep working at your lifts. You have a gift in being able to pursue these lifts with someone who knows what they are doing.