WHenever I've had a blocked nose in pregnancy, I've used a Normal Saline FESS spray, which you can get from a pharmacy. It sounds ridiculous, but it does work. Also, try asking the pharmacist if there is a nasal decongestant you can use in pregnancy. I used Prolaramine at my pharmacists suggestion for night time (it does make you drowsy), and it worked. I only needed to use it for 2 or 3 days.

Good luck with the wedding!!

julesy