Can I appear as a Pro Se for an estate?

Have you been appointed as Executor or Administrator of an estate? Is this arising out of a wrongful death case? Lots of questions, but generally the answer would be yes, provided you are properly appointed and have standing to act as the Estate's representative.

Yes, most likely you can. You haven't posted a lot of details, so there may be some issues that I'm unaware of. I realize you probably well out of court by now, or at least I hope you are it's been 4 days, but I suggest sitting down with a probate or will & estates lawyer for a short consultation. It'll be free. And you can have all your questions answered to make sure you're doing this the right way. Good luck. I hope the court treated you well.

From my experience in observing probate in Cook County, the probate judges will generally not allow the estate representative to open an estate pro se. Furthermore, the representative is entitled to hire and pay for an attorney from estate assets.