I really don't know, if I am the right person to suggest. But my sister too had this problem. Her OB had advised her complete rest during her pregnancy. She used to flare up real bad. She was on Pred 60 mg, Sulphasalzine 12 tablets a day, Folvit, Iron, Calcium, Alpha D. Fortunately, the things went out well, and she has been blessed with a son, who is now 9 years old.
Please take rest. Take a second opinion. In case, abortion is the only option and inevitable, go for it. God willing, you will be on family way again. My sister faced similar situations. As you are young, time is not running out. Take care.
45 years Male Attorney
Diagnosed UC October 1989
Had two stage J Pouch Surgery Nov 2005; Take Down March 2006
Complications after surgery - Incisional Hernia and Ano Fistulas
"There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle: Albert Einstein
"What you are aware of you are in control of; what you are not aware of is in control of you."