How old is your child?
Keep in mind that "night time dryness" takes time... even up until 7 years old age. And this is completely NORMAL.
Night time dryness is a whole other ability. Biologically.
All I do is, put a waterproof bed pad under my kids. This makes clean up much easier. I have about 4 pads on hand so I can replace and wash the others as needed. You can find them on www.amazon.com
Next, my daughter was in night time diapers until she was 5 years old. All normal. Per our Pediatrician as well. She wore them for nap time too.
Also, my daughter would sometimes have accidents in her sleep, because she slept SO deeply. It can't be helped. She even had a dream once that she WAS on the toilet.. until she felt herself get wet.
We don't scold or punish for it. The biological "control" is not something that you can control.
Potty training is 3 fold: first is peeing ability on the toilet, then pooping ability, THEN night-time dryness ability.
Your son has only been potty trained for 2 months. That is not long at all. He is just starting... and a child is still getting it.
There WILL be accidents along the way.
Even Kindergarten or 1st Grade kids have accidents or wear night-time diapers. ALL normal. Even my daughter's Teacher said so and our Pediatrician.
Being wet, does not necessarily "make" the child stop. They may be trying mentally... but biologically, it may not happen.
All the best,
Susan