Tbol will have cleared your system within a couple of days. As for damage it may have done, thats really hard to say. Your best bet is to get blood work done to see exactly whats going on with it.
As for acne, a lot of times, acne is related to flucuation in hormone. The more you split your weekly doses up, in to smaller doses, the more your levels will be stable. A lot of times, I do EOD shots, even with long acting gear. For me, part of that has to do with the volume of oil I use per wk, but part of it has to do with keeping levels stable and avoiding acne. With Sust, your best bet is to do EOD shots because of the shorter esters.
As for PCT, there is no need for you to do a PCT if you are using HRT from your Dr. As long as you are on gear, you can't recover. If you ever wanted to do PCT and not take HRT test from your Dr, you would need to come off of all gear, completely. Sounds like you are at a good level though and that things are stable on your HRT. No reason for you to attempt going off, as long as you are comfortable with the program