Can't sleep due to intense pain and I don't know what to do?

I had knee surgery 2.5 months ago. I am now walking and doing Physio 2-3 times per week as stated by my doctor. I have been doing physio for 4 weeks and have made quite a bit of progress but no where near perfect, my quad is still really weak. A worse problem is I have problems sleeping cause I can't get comfortable. My hip and knee hurt. I think my hip hurts because it does a lot of work trying to get my leg to do what its supposed to. I have tried putting a pillow between my legs but it just presses on the surgery site. I have tried laying flat on my back but my hip and knee start hurting, rolling on my side (hip hurts worse), etc. I can't seem to find a good position. Then you would say to take pain meds...I work at a place where people are randomly tested and they don't like you to have pain pills in your system...tyelnol or aspirin is fine but not hydrocodone or narcotics. Its a fireable offense. Next you would say to ask my doctor about it. I have told him and he says sure it hurts and sure its taking you longer to get better...so just keep doing Physio and take some pain pills. So I am sort of in a loop hole. I am curious if there are any ideas on sleeping....is there a comfy way to sleep? Anything I could do during the day? I just need ideas on what to do. I am currently running on 4 hours of sleep and I have a long day ahead of me. Please help. (26 years old, Female, 155 lbs, perfect health - had my wellness check-up yesterday and my cholesterol is low and all other blood work was top notch, 108/70 blood pressure)