Lupus?

My son was born January 2nd. About three weeks ago I woke up one day and was pretty sore. I thought maybe I had slept wrong. The next day it was worse. And by the third day I woke up and I had SEVERE muscle and joint weakness. I couldn’t even lift my son out of his bassinet and I couldn’t hardly walk. It took everything I had to get out of bed. My upper arms were so weak I couldn’t even lift them to change my shirt. I couldn’t hardly bend my knees or my elbows. I called my mom to come sit with my kids and my dad drove me to the emergency room. They ran some blood tests and put in an iv for fluids. Everything came back within normal limits. They sent me home and told me to follow up with my dr. I’m still waiting for that appointment. The week before this all happened my husband had mentioned this weird rash I had on my arms. And I had mentioned to him that my wrists hurt. Felt like I had sprained them but I hadn’t fallen or done anything to cause it. For years now I have dealt with extreme fatigue. I could sleep 24 hours a day and it wouldn’t be enough. I feel like my body has been slowly declining since I had my daughter 4 years ago. But this last episode was horrible. And it lasted about ten full days before I started feeling a little better. And even now I’m still feeling muscle weakness. But it’s bearable. Anyways I was talking to my sons pediatrician about it at one of his checkups because he use to be my pediatrician and he suggested I have more tests ran as this isn’t normal for someone my age. I’m 25. He mentioned that I have a lot of the early symptoms of lupus, and that this sounded like a flare up. And I started researching and it’s crazy how much I can relate to it. I’m trying not to jump to conclusions and I know it could take years to get that diagnoses. I’m just wondering if anyone has ever been through anything similar and could give me some advice? I’m not the kind of girl to go to the dr, or emergency room unless I have to. I have a pretty high pain tolerance and I put my health on the back burner a lot which I know isn’t smart. But after what happened a few weeks ago I’m ready to figure things out and come up with a game plan to get my health back on track. So sorry for such a long post. Thank you for reading if you have made it this far. I’m just stressed out and want to know what’s going on with me and if there’s an underlying reason for all these symptoms. 😔