Hi stephnicoledavis
Sorry to hear of all your hormonal problems, can I check with you, your injection with the nurse is Depo Provera? If that's correct, then you're not getting a double dose of estrogen, as the Depo contains medroxyprogesterone.
Do you know what HRT you've been prescribed? Others on here have lots of knowledge if you can provide a bit more info.
Have you tried Freederm gel for your skin, or alternatively ask your doc to try Isotrex gel? I used to suffer badly with my skin and had Retin-A before I had my kids, had a few spot free years then a bit of a reoccurrence last year, with painful lumps on my chin. I got Isotrex via an online GP, by sending in selfies of my skin (embarrassing). I felt it was a safe service as it was through Lloyds pharmacy not somewhere foreign and dodgy. It cost £25 for the consultation plus the cost of the gel which I collected in store the next day. To me it was easier than trying to get in with my GP and being embarrassed talking about it or being fobbed off. My skin was upsetting me enough without having to try and persuade my GP that it was bad enough to treat. The gel, well It did help and settle it down again. Obviously there are lots of other treatments to try, sometimes antibiotics are more effective. Ask your doc.
As for the bikini/ swimsuit issue, I understand it's hard to feel confident when your body is doing strange things, but there aren't many of us who are completely unselfconscious and others will probably be worrying more what they look like than what you look like- just hold your head up high, buy swimwear that you love, be it for the style, colour, pattern or price, and a Sunhat, big shades and a fab bright lipstick, and enjoy the break. Take care, R x