Just to help with the sleep & blocked nose I was told its ok to use the nasal sprays. I use the one you can buy at the supermarket & was told as long as I don't use it willy nilly and for no longer then 3 days in a row its ok. I would use it after I had a shower, just before bed. just to help me sleep. But I think the fact I could blow my nose & actually get all the crap out made a difference. I also had a cold about 2 weeks ago that took a hold and lasted about 3 weeks.
Sure hope you are feeling better soon & are looking bright & glowing for your wedding day.