I've seen another PT (that is taking care of my 'old' father), and discussed 5mn with him, he told me that basically you can do PT to strengthen your arm / wrist (he saw this as positive), but whatever you do it takes more or less 6 to 12 months to get away for middle to severe cases (himself had a long lasting case for 1,5 year).
He was not surprised i resumed playing - as long a no more pain the next day seems ok - there is no 'magical' trick to recover (an no definitive view between 'no play at all' or 'play as much as can without much pain'...). Maybe you could slowly get back on court - being carrefull but gradually increasing the load ?
i've played 1 hour private lesson on Tuesday with a very good player (a 20 year old boy within top 300 in the country), hit as hard as i could, part of the lesson was focusing on attacking in 1 HBH, no major / noticeable pain during and after. Playing in clash V2 100, multi at 20kg, it's a pretty good set-up to avoid / limit pain...
Notes:
- i'm six month post PRP shot, started back slowly tennis 3,5 months after the shot, continued despite some pain (my first tentative was very painful - but sport PT and doc told me to carry on...). Hope as well to be able to play a entire match by october serving full speed (will be month 8 to 9 as well).
- my tendon was showing multiple micro tears (which was still the case in a control MRI held early June, 4 months post shot)
- doing a lot of PT (20 to 30mn a day, almost every day) since D+10 after the PRP shot