Cough and Cold..

It must be true that your immune system is weaker when you're pregnant because I can't stop getting sick! 
It started with the stomach virus, and now I'm on to a cold that's lasted about two weeks! (Both of which I've gotten from my one year old son.. he hates me! 😩) 
This cold is about to kill me, a horrible cough and sore throat and my nose is so stuffy I can't even consider breathing out of it. 
My main issue is that my son is over his cold, but I'm worried that he's going to get better and in going to get him sick all over again. 
Anyone know of any good remedies for a cold while pregnant?