How are you? Usual complications from varicocelectomy are recurrence, infections, injury to internal spermatic artery and pain. I think it could be recurrence of varicocele on both the sides, but this can be confirmed only with scrotal ultrasound.
But as you mentioned, swelling in the lower abdomen on both the sides, it is difficult to say but could be a hernia. Physical examination is vital, to diagnose the situation.
I would suggest that, you get an opinion of a urologist immediately.
If it is a varicocele, treatment can be considered later on, but if it is a hernia or infection treatment would be required immediately.
All the best