I have had Asthma for 25 years...I have taken virtually everything out there. And have gone into respiratory arrest once. The fairly new pill Singulair has been a godsend! 1 pill once a day. No shakes, no rapid hearbeat, no sleeplessness ( all associated with other pill form asthma drugs ie: theodur, theophylline). I also take Servent inhaler 2 puffs twice a day-long acting alburterol-minimal to no shaking.)And Pulmicort-steriod similair to asthmacort, but in my opinion works better. With these drugs I next to never use my "rescue" inhaler (albuterol/proventil).
Also as posted above, sleeping propped up with extra pillows helps alot at night.
Hope this helps give you ideas to explore with your MD.