Also: Lupus and Pso/PsA actually have a lot of symptom overlap (and all of that could be PsA, but overlap syndromes (having two or more autoimmune conditions) is unfortunately a fairly common phenomena. An ANA (blood) test would give you a pretty good idea... there's a couple other antibodies too. But it's also totally possible that it's PsA that's mimicking Lupus (RA and IBD can also be mimics). My rheumatologist tested me for Lupus too because I get the butterfly rash on my face, but it doesn't seem to be caused by sun exposure (it's actually kinda random?). Also the blood tests were negative (we were just chasing antibiodies that weren't there, fairly certain it's all Psoriatic for me). It took about a year before we figured out that I had PsA (after 10 years of misdiagnosed palmoplantar Pso).

I have lupus and it sounds like you have it too:(

Wow! I've developed this rash on my cheeks and "chicken skin" on my body. What's happening to my body???

After pregnancy my disease got a lot worse too (to my understanding it's kinda 50/50). I felt like I got beat to heck (and looked like it because apparently my disease likes to bleed so I had big, very colorful bruises all over and a blueberry-sized clot in my arm (luckily not in a vein!)).
I'm sorry you're dealing with that.

Glad you're going to see a doctor about it. I hope you're able to find some effective solutions quickly.