I Am A 36 Yr Old Female With A Rash

I am a 36 yr old female with a rash that suddenly appeared on my legs along with bruises all over my body that appear suddenly then it disappears from one spot and re appears somewhere else. I have been circling them with pen to keep track. I circle all my bruises and check on them and notice some bruises I circled are gone and new bruises appear somewhere else. I'm noticing a couple bruises that are lasting longer have blisters in them.
All my joints are swollen and my hands are red with a rash on the back of them and swollen making bending my fingers difficult.
I also have abdominal pain.
I don't know if it's related or just a coincidence but I was bit by a spider the day before it all started.