Sounds if some of it is DOMS. How is your hip mobility? The lower back should be stable(hardly moves), and the hips should be moble. It is common for the hips to get tight and loose mobility. When this happens the lower back tends to move more than it should. This allows more opportunity for injury. It will also make the lower back prone to being stiff and sore.
An exercise for lordosis is lay down with your back and feet on the floor, gently try to make your lower back flat. Also get an ab wheel, they are excelent for trunk strength and should help counter-act the strong pull from the lower back and balance the hips better.
I hope this helps. I don't know anything about those compounds, maybe someone else has some insight aboout them.