Well, I won't tell you much about the poor fellow that had his hip replaced at the VA and had issues, turns out the joint had been recalled years prior and was NOT supposed to be used.
Not trying to scare you at all, Just want you to know there can be issues.
Listen to the therapist and keep a good track of pain, swelling and so on, and if you start feeling sick, infection can be disastrous. We want you healthy, happy!