shortness of breath?

hello, every night akong hirap huminga, may hika po ako pero nawala n sya before ako mabuntis. Ngaun Im 16weeks pregnant and lagi akong may shortness of breath. I take bricanyl sbi ng OB ko un n itake ko instead of Salbutamol/spray. Nakakaexperience dn ba kau ng breathless s stage n ganto?