So my H has an upper respiratory infection and I seem to have gotten a mild version of this, so my sinuses are stuffed up. I've looked at my list of approved meds from the doc and it basically doesn't include any decongestants except Mucinex, which has never worked for me. I'm thinking about trying the neti pot because it's just a saline solution but I don't know anything about them. If you have used one before please come share your wisdom with me.                 
                             
        
Re: Any neti pot users here?
It's amazing!! - Creepy, but amazing! Be sure when you use it to tilt your head very far forward over the sink. The first time I used one I didn't have my head tilted far enough at first and the solution started to run down the back of my throat. It's pretty simple otherwise, just hold it up to your nostril and relax (then switch to the other nostril). Depending on the severity of my stuffy-ness I occasionally have to do it twice in a row, but afterwards I feel like a whole new person. I highly recommend it!
I use a sinus rinse bottle that is similar to the neti pot. It is the same solution, but you squeeze the bottle into your nose instead of tilting your head and waiting for gravity. I feel a drowning sensation at first, but it drains all types of icky out of the sinuses and it is absolutely wonderful! It keeps me from getting so many sinus infections. Here is a link so you can see what I use.
https://www.amazon.com/NeilMed-Sinus-Rinse-Bottles-Premixed/dp/B001HDRHR8
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I use the sinus rinse squeeze bottle. It's amazing when it works! You can breath again!
I use the squirt bottle one- now that I can't take Claritin D anymore this is my only way to keep my allergies in check
.  It takes a little getting used to but it does work really well- especially if you are prone to sinus infections. Keep in mind that if you are super stuffed up (like from a cold) it's hard to do because the solution doesn't have anywhere to go. It will sometimes drip down the back of your throat so you have to make sure you don't swallow and breathe through your mouth. The strangest thing is when my ears will occasionally pop after doing it- it's weird how everything is connected to your sinuses. 
Love love love mine! My OB said in general it's good to try more natural remedies before reaching for drugs which makes sense - I've had mine for a couple of years. However, I seem to be extra clogged up and sometimes even the neti pot water can't bust through.
Get one! It's awkward at first but after a few days you'll feel great. Plus, you don't have to worry about the effects like you would drugs.
Another thing I've used in the past is something called a 'shower soother' from Vicks vapor rub (or the Target brand). I'm not sure if it's OK to use while PG, but I would think so if Vick's is. You just take a regular shower and put the alka-seltzer like tablet on the bottom of the shower. The water dissolves it and you get pleasant/not super harsh vapor smells that help clear you up.
Might have to check to see if they are approved for PG, but grab some if they are. They are WONDERFUL!
With my first PG I got bronchitis twice. The shower soother's were amazing.