I was just in the same boat, but am slowly paddling to shore...
For the sore throat, I too tried everything. Marshmallows were a big suggestion, but only a little help. What worked for me was a whole can of pineapple with juice and a whole tray of ice cubes, blended until smooth. It cools the throat (even though usually I prefer heat) and the pineapple kills bacteria to help it heal faster. It worked like a charm!
For the ear aches, I slept with a heating pad on my pillow to apply heat to my ears (whichever one hurt worse). Be sure to use one of the timer heating pads so it doesn't stay on all night and cause problems... but the heat overnight helped ease the pain in the morning as well.
Humidifier for the nose, along with a little vinegar in vaseline right under the nostrils. It works sort of like Vicks?
The eye infection, I didn't have recently, but my grandmother treats them the same way as a sty... warm tea bag on the eye lid for a little while, pat dry, keep the eye closed and repeat.
I hope you feel better!!
PS - My doctor told me Mucinex is pretty dangerous to take while pregnant. The only thing she recommended, other than the tylenol, was the basic child's Robitussin cough syrup... but even then, she said I should only take it if I couldn't tough it out. She said it's better for baby to go the natural route if possible. HOWEVER, if you feel a fever coming on... call your doctor right away. Fevers are definitely not good at all for baby!