I've been having crackling in my left ear (with faint echoing and slight pressure) for the past 2-3 days. Currently I have to fly back home today but after reading some symptoms online and people are saying not to fly. I've read it might be an infection or 'Eustachian tube dysfunction' (which is the worst case). I have to get home and i leave today (driving isn't really an option). Is it safe to fly or is there a way i can make it safe (in a short time). Thank you.