Is it common for pseudoseizures to cause a lose of bladder control?

No. It is not common to lose bladder control with pseudo-seizures. That is more likely to occur with seizures. Pseudo seizures often occur due to a stressful situation, they are unconscious in origin, but they have no neurological findings. They have no post-ictal phase as typical seizures do (like loss of bladder control) and may be treated effectively with therapy.
No. Loss of bladder or bowel control is one way that physicians distinguish between a true epileptic seizure and a pseudoseizure. However, underlying psychological stresses that lead to pseudoseizures could be severe enough to cause this as well. A physical exam from your physician could help determine if you have a worsening seizure disorder, urologic problem, or psychological condition.