Orel Vein,
Since you saw a physio, I am assuming he screened you for any red flags. So my suggestion would be to start training again.
Start at low weights, like a novice again, maybe even lighter that you previously have done. Take conservative 5# jumps, long rest periods, make sure your recovering well on your rest days etc.
If your pain is only with your DL then perhaps you can start with a rack pull. Start at knee height or just below or what ever range is pain free. Use a moderately challenging weight for one set of 5 reps, lowering the pins by one hole each session. Keep the weight the same on the bar until the bar reaches the floor. Once the bar reaches the floor, start increasing the weight by 5# each session. This process should take a few weeks, don't rush through it.
If you are experience pain during the progression or need some help you can reach out to cpalladino29@gmail.com
Let me know how it goes.
Good luck