Ear block and dry mouth. Help me. thanq!

Hi am 21weeks pregnant. Done Anamoly and blood test Abt HB, glucose, TSH, urine analysis... My every report came normal and baby is normal as well . Now, more than 2weeks(exactly from may 7)., I had ear block and dryness in tongue nd mouth... No saliva secretion. This Oly happening during night time. I couldn't able to sleep properly for 1hr. My doc told it is bcos of ventilation prob... She ask me to make proper air vent in bed room.. I did ... And not at all switch on AC too... I had vapour continuously at one point I get cleared all those and feels good to sleep. But now past 2days again the blockage in ear, dryness in mouth started. What should I do ...? Do I need to go for 2nd opinion ... So Oly I came here... Pls help me. Thanq