Can I be sent to jail for unpaid child support?

I lost my job when COVID hit and I’ve been looking for work ever since. I filed with the child support office in Philly to reduce or stop my payments but I haven’t heard back from anyone since I submitted the initial application. My kids’ mother says she is going to ask for contempt against me and that I could be sent to jail for 6 months and have all my bank accounts seized, although there is not much money left for them to take. Can I be sent to prison if I legitimately lost my job and tried right away to get the child support amount lowered? And why would they send me to jail when I’m looking for work? If I go to jail my ex gets no payments from me.