Cough and phlegm in early pregnancy

Hello, I have posted something similar during my previous pregnancy. I am almost 9 weeks pregnant and for the past week I have terrible expectoration and cough problems. As the days go by my problems become worse.
During my last pregnany I was advised to take tissue salts, so I am taking them 3 days now but haven't seen any improvement. I take thrice daily:
ferrum phos 6x
natrum sulph 6x
kali mur 6x

My symptoms start of as an allergy, slightly runny nose, sneezing and itchy eyes. Not too severe and they subside on their own. As time goes by I have the follwing symptoms:
Every morning on sitting up I have the urge to cough up the phlegm which I feel is stuck in my throat. It usually is thick and greenish yellow and in small pieces. Throught the day it is clear and more from the throat and mouth rather than the upper chest.
For the past week I am worse. I have a tickling cough, very hard and a little painful. I think it's forced most of the time to dislodge the phlegm, which I then wipe or spit from mouth. It is clear and sometimes a little yellowish. It's mucousy in texture, like an egg white and clings to my mouth.
I also have a runny nose, clear discharge.
At night I have been sleeping on 2 pillows and have been able to sleep. I do not wake up to cough or spit. If I do start coughing I feel that I will sart and won't be able to stop, like the mornings.
My sinusus were a little sore yesterday from the nasal discharge.
This is a problem I face regularly (post nasal drip and expectoration) and for this problem I started homeopathy. It just gets much worse every time I'm pregnant (4th preg.).
Some more Information:
Pulsatilla is my constitutional remedy and fits me well.
I don't like the heat and always uncover my legs when I sleep.
I am sensitive and wheep easily.
I prefer sweets but not as much now due to morning sickness.
Today I wasn't able to get rid of the phlegm that was stuck in my throat, that eventually I felt so nauseous that I vomited.

I would appreciate any help, as this situation is making my life difficult.