Hey LittleMiss :)
Ok, I get a lot of mucus due to asthma, these things have all worked for me in the past. The thing with mucus is, it's going to come up. Some things just make it come up quicker.
First of all, if you can, drop all dairy from your diet. Makes you produce more mucus. Just for a couple of days.
Drop the honey from your drink, and try lemon juice alone in hot water. Honey coats your throat (hence is soothing to a sore throat) but that's not what you want if you're all clagged up.
A saltwater gargle (obv don't swallow) will clear your upper throat as it cuts the mucus, much like lemon.
To shift the deeper mucus, you need steam. A hot shower is a good start: just sit in there for ages, as much steam as possible, and bring up what you can. If that's not possible (hg is making me hate showers ATM), hunch over a bowl of steaming water with a towel if needed. You can add a teaspoon of Vicks, a few drops of olbas oil, or lemon oil, or eucalyptus. Some people swear by oil of oregano but I detest the smell. Only do this if the smell won't make you sick.
When I don't have hg, once I've steamed, I lay on the bed with my head and top half just slightly hanging over the edge, and get dh to vigorously bang me on the back for a while. Doing this after a steam and an apple cider vinegar gargle usually brings it up in great globs. You may not fancy this while a. Pregnant and b. got hg, however (you couldn't pay me to do it now) :) However, your dp could bang you on the back a bit (think the chop chop motion of a massage rather than help I'm choking) while you were sitting up?
I have yet to find a solution to mucus which didn't involve the nasty bit of it all coming up. I'm sorry: I wish I knew one and hopefully someone brainier than me will come along :)