Try sleeping with your ear on a heating pad on low.
Breathing in steam helps me if I breathe it in long enough.
This thing makes it easy (and it's safer than sitting over a pot of hot water with a towel over your head):
Search on Amazon using 'steam inhaler' - there are other models.
A neti pot using warm saline also helps me.
Sorry it's not working for you.
Putting anything into your ear won't help - your ear drum is in the way and you don't want to rupture it.
I've found out through experience that after awhile a decongestant does NOT help and will make things worse.
It will dry the fluid out making it sticky and harder to clear from your eustachian tube(s) - it has to flow in order for it to clear the tubes.
To thin the fluid out, drink lots of water (and/or tea) and try an expectorant like Mucinex.
More fluid in you will also help with your drop in blood pressure.
I hope you feel better soon.