Thanks for query
in preganancy in about 1/3rd cases get deteriorated.
To acheive control of asthma is the most important issue in pregnancy
because effect of uncontrolled asthma on fetus is more deleterious than the asthma medications.
As such no asthma medication is contraindicated in pregnancy.
So immediately consult a pulmonologist
and get optimum treatment for asthma to control it.