I haven't always suffered from sinus/allergy issues as I have from migraines. I've always suffered from migraines, ever since I was little. Upon moving to Oklahoma however, I have developed somewhat of a constant sinus issue from allergies which have definitely increased my migraines. Here's something that we've found that helps.
Have you heard of Navage? It's basically a nose flushing device. If you're like me then sticking anything in your nose or pouring water down it doesn't seem like something you'd want to do. The thought of drowning to clean your nose is definitely a turn off. This device flushes your nose while suctioning the water out the other nostril.
It took a few times to get used to, but has turned out to be a big help! Give it a try! It has helped me relieve sinus pressure, congestion, and sometimes my migraines. It has also help cut down time of a cold. Well worth the money in my opinion. You may be surprised what you see comes out of your nose when you first do this. Especially if you have a cold/flu, but keep at it and stay healthy!
Here's a referral link, when you click it and purchase your first navage nose cleaner you'll get a $20 discount!
*Not a paid endorsement from Navage I just love being able to breathe that I wanted to share :)