It's possible you're just reacting to the weather changes. A hot shower works wonders on noses. I find relief whether .I'm congested or runny.

Make sure the tissues you're using are super super soft (i prefer the ones with lotion) keep something warm on hand whenever possible like hot cocoa or soup. And if you don't feel like getting wet (might sound weird to some of you, but I for one hate getting wet especially when it's cold) just run the hot water in the shower and sit on the toilet with the seat down. The steam will work wonders, hon.

I can't give an answer about your mother's condition during her pregnancy, but these are a few drug-free methods I used during my pregnancy and again just a few weeks ago. Hope they help a bit!

Well thank-you , yea my mom said she was just stuffed up for 5 months of the pregnancy and a few weeks after , something with her hormones making her mucus membranes swell or something like that...Hopefully I don't suffer the same thing , hehe I hate a stuffy nose.
I'm off for that hot shower now!

They have a saline nose spray that was suggested to me while I was pregnant. With the cold out side causes the heater to run regularly inside which causes the air inside of your home to be dry a humidifyer is great to have around plus it will not go to waste after having the baby because you will use it for the baby as well.