Hi, thanks for reaching out.
Yes you can suffer pain legs due to disc bulge without any back pain.
I would suggest you to check the type of pain you suffer, is it stretch like or sharp shooting or pain of tiredness or soreness ?
As nerve pains are mostly sharp shooting or stretch like. Heaviness in legs do suggest pain due to lower back issue.
You need stretching exercises in legs as well as proper lower back treatment and strengthening.
Next Steps
avoid forward bending , lifting weights and prolong standing.
Health Tips
lie down with pillow placed under knees.
lie down on your back, keep 3-4 pillows under legs to raise them and then do ankle movements, this help in proper blood circulation. if this exercise aggravates pain then stop it.