Ear blocking / deafness?

Alice

This is a really random one but it only started happening around 15w.

I'm currently 25w and every now and then I feel like my right ear totally blocks and I can't hear. Everything is muffled but my own voice is insanely amplified as I hear the vibrations from inside my head! I can't regulate the volume of my voice or the tone which is really strange.

There is NOTHING I can do to fix it when it happens! Yesterday I was walking around the shops with a friend and today was out for a hike with my partner and his kids and I lost hearing in that ear for hours.

Has anyone else experienced this? My hearing comes back once I'm in a quiet environment again...