Delayed Onset Muscle Soreness (DOMS) is going to be present no matter what supplements, diet, etc are being utilized if you just started lifting 2 days ago. You should not be working out hard, especially just beginning. Personally, I would stop lifting now until the soreness goes away, that could be a week (was for me when I started), and then start again SLOWLY, using a well-structure periodization program. Take advantage of your newbie gains and progressively increase overload over 2-4 weeks until you work up to your maxes. Since you just started lifting, benching 20 pound dumbbells are going to overload the correlated muscle fibers enough for hypertrophy (growth), and stretching out the potential of your newbie gains will be very good in the long run.