I was really bad sick for almost 2 weeks and couldn't even lift and then the physical problems started. Before that i was doing the 12 week transformation challenge and i was feeling it perfect (I have 1/2 year gym history and never felt any kind of this physical weakness and pain). After the 2 weeks being sick my lower back started aching and the pain was not that bad. I told myself "it must be the reason after lieing in bed and the lack of movement in my daily activities" and that i should go to the gym to get some training and back on track (did it with like 70% of the weight i used to lift), but it didn't go as i planned it. My lower back hurts more, my brachioradialis started to ache also and i got almost no energy left after the first 30 mins in the gym. I try to keep my diet plan clean but it destroys me emotionally. What should I do? Stretching and light weight lifting, staying off gym for a week or maybe looking for a specialist?