Nose and head congestion during 2nd trimester

Sevine
I am 21 wks pregnant with our first baby :) and have had major nose and head congestion leading to insomnia and extreme fatigue. Can anyone share what you have been taking if you share the same symptoms? I haven't taken any meds but it's starting to become to the point where i can't breathe. Doctor said it's normal during the second trimester and he would give me a prescription but i prefer to go the natural route. Any suggestions?