New pain/ flare up

Diagnosed with UCTD (SLE Sjogren overlap with neuropathy)..
Started having generalised body ache and joint pain since yesterday along with excessive fatigue, nausea since few days.
Now everything hurts so bad, couldn’t sleep properly at night, even painkiller didn’t help much.
NEVER had joint pain before so I guess this is a new addition and I don’t know how to deal with it. Also extremely anxious that it’ll become a recurring symptom 😭
Would anything help at this point?
Scheduled for second Rituximab infusion in around 15 days