What Causes Seagull Sound In Ear?

hi doctors, i've been bothered by this issue for about 3 days already. I use earplugs to help me sleep at night, because my husband snores and every little noise wakes me up. And for the past 3 days, i would wake up hearing like seagulls in my right ear. Thought it was just my imagination but today the sound was louder and it lasted for about 5secs, i went to the bathroom and i could still hear it. I'm worried what am i experiencing, but for the rest of the day it dont hear it just in the morning. am i losing my hearing or are there insects in my ear. please help me, i'm also 33 weeks pregnant and this issue is stressing me out. Thank you so much for your help.