Hi
I am also a bodybuilder and had a clinic dealing with atletes.
I had a very similar problem, as you train with heavy weights i assume that you abs and lower back muscles are very strong as well as your legs.
I suggest rest for a while, anti inflammatories and maybe muscle relaxants.
You dont have to stop lifting or even stop lifting heavy weights, you just need to adjust your training accordingly. I still lift heavy and have a L4 and L5 prolapse.
I would not worry about it too much at this stage but if the pain continues for more than a week then you should see your doctor and get him to recommend you to a physio who has experience with athletes.
Let me know how you get on
Ik
I