My wife and 2+year old son are US citizen. My I-130 was filed a week ago. Is there any provision or category that could help me join them asap, even before I-130 is processed, considering my child's medical situation. He was born in Canada with complications, been through 2 surgeries. His medical reports clearly shows that he needs special care and monitoring which is very difficult for one person to take care. My wife works and takes care of our son too. He has to be monitored every 3 hours during a day. What are the chances for me to join them even as a visitor to support in care. Mind that K-3 is not the option as we were married in Canada and I am now back to Pakistan. K-3 has to be applied from the country where marriage was held.