Contact with ex

So my ex and I broke up about a month ago. I’m having some health issues and am waiting to hear back from my cat scan to see if I need surgery. I had this problem before we broke up but it’s back now and might need more extensive treatment. I’m scared. I don’t have many people to talk to and I really want to talk to him about it. We’ve been in contact a few times since the breakup but nothing serious. I just want to talk to him for comfort and just to get all my worries out because I’m very worried there’s so many things that can happen regarding this. Should I tell him what’s going on? He said he still cares about me and we didn’t break up on bad terms at all.