I had the same issue for years and apparently that's a strong indicator of sleep apnea. Most people have a full bladder and need to piss all night but when you're asleep your brain shuts down that sensation of needing to pee and prevents your bladder muscles from contracting so you don't piss the bed. Apparently when you wake up multiple times to pee it's not due to having to pee, it's due to having your sleep disrupted by something else causing your brain to wake up which also awakens your "having to pee" sensation. Even since I got diagnosed with sleep apnea and started using a CPAP I hardly ever wake up to piss anymore. Not to mention all the other positive life-changing effects. Maybe get a sleep study done.
As others have said I'd start at a lower dose and start with ACE instead. I'd start with 75mg EOD (about 260mg/week) of Tren Ace. Worst case if shit goes south you can jump ship and the ACE will clear your system quickly and you'll go back to feeling normal quicker rather than waiting weeks with Enanthate.
Mast and Proviron are extremely similar in structure and have almost identical properties. Mast is a little stronger on the physical/anabolic properties and Proviron is a little stronger on the mental/sexual properties. If I were to choose which one to run with Tren I'd go with Proviron. It's just one less thing you need to squeeze into your syringe and seems to be more effective at lower doses when it comes to keeping you balanced and keeping everything mentally/emotionally/sexually in check on cycle. Rather than pinning 200+ mg of Masteron, you can just pop 25-50mg (or more if desired) of Proviron and get the same desired effects.
We're just talking about stabilizing yourself and mitigating Tren's unwanted mental side effects. If you're also looking for the pronounced physical effects then Mast would be your choice, but then you'd need to increase the dose to probably 400mg+.
See my post above this one regarding using Masteron vs Proviron. Might help with your dilemma on pinning 3mL.
However if you do end up pinning 3mL you may want to consider trying new pinning sites. Quads, glutes, and ventro-glutes are all great spots that can hold a lot of oil. Personally I've never had issues with pinning 3mL in my delts but it all depends on the size of the muscle and the person.