I hear you, Katrina – I hate using drugs, too, unless I have no other alternative. Let me make 3 suggestions that you might find helpful:
1. First, learn to use a neti pot (or even do as I do, and simply sniff saline water directly from your hand) to clear out nasal irritants. It's also good for head colds. Just about everybody from my 5yo grandson to aging people like myself get fabulous results from this.
2. Ask your doc about using cortisone mists or sprays locally – the nasal sprays and bronchial sprays are tiny doses that pretty much stay where they land (almost none is absorbed into the bloodstream), and they can be wonderfully effective at reducing your body's reactivity to allergens. I've used Pulmicort for decades for my lungs and almost never have an asthma attack since, even though I can not tolerate Albuterol. I use the nasal sprays seasonally when certain pollens are at their worst, also with very good results. I believe these are safe to use while breastfeeding. At least inquire about them.
3. Consider consulting a doctor of homeopathy. I've found a couple of homeopathic remedies that instantly begin to reduce reactions, and usually I get enough relief that I don't even have to consider using an additional drug (beyond the cortisone inhaler that I rely on). About 80% of users are responsive to homeopathy, and it is considered absolutely safe and generally completely free of side effects.
You can learn to use homeopathics yourself if you have the time and patience to do a bit of reading. A more direct route would be to visit a practitioner. The first visit is a very extensive interview, and may cost a couple of hundred bucks (ask when you call), during which the doctor finds out ever possible detail about you and your symptoms. This guides him/her to recommend the best of (usually) several remedies. If this remedy doesn't give good results, follow-up visits or phone consults are usually inexpensive, and the remedies themselves generally cost under $10 per try.
I wish you well.