Need help after endoscopy

I had an endoscopy 2 weeks a and was dilated and scar tissue removed.
Since that time, I am struggling with pain when I swallow and can't eat solid foods. I've mainly been drinking liquids or liquified solid food, like mashed potatoes. Doctor put me on 40 mg of steroids and prilosec. For 10 days, I would regurgitate anything that I swallowed. I'm very scared and not getting answers as to why this happened.
I suffer from Lupus and wonder if it's just excessive inflammation or there is something else going on. I've had a esophagram with contrast and it didn't show a perforation.