If it ain't broke, don't fix it.
I guess I'd want to know exactly what the goals of PT would be at this point. If you can achieve those goals without going, then....why go? If you can't achieve the goals, how will PT accomplish it WITHOUT aggravating the psoas muscles this time?
I came to this forum several years ago quite entrenched with the idea that PT was only a good thing, and didn't understand why anyone would not seek it. I switched surgeons for several reasons; one was that he didn't prescribe PT. While I've had mostly good experiences with PT, I now completely understand that it may not be necessary in the first place, and it has the potential to do more harm than good. For me, I am a total slug when it comes to exercising on my own. I really need the external push that a therapist offers. But it's all too easy to let a PT push a little too much a little too fast....they are the experts and we want to please them. So if you do go back, stay VERY attuned to what feels right and simply refuse when something feels wrong.
Or...wait a while longer and see how you continue to do on your own. PT will always be there later if you need it.
Sharon