2) HMF Probiotics are very helpful in allergies and will also protect you and your baby from yeast problems, as well as help your total immune system and absorption of nutrients. I cannot say enough positive things about HMF Probiotics.
http://www.rockwellnutrition.net/HMF-Probiotics_c_100.html If your gut function is not great, start with 1-2 bottles of HMF Intensive - 1 cap with each meal totalling 3 per day. Then after 2-4 weeks, you can switch to HMF Super Powder and take 1 tsp daily. Because 60-80% of your immune system is located around your gut, having these good bacteria help protect your immune function by fighting many of the battles ingested via the mouth. They are essential to good health, and will also help ensure your vaginal canal is healthy for delivery.
4) Lastly, I recommend a healthy omega-3 fatty acid supplement such as Super EFA Plus by Genestra. Omega-3s are proven to support the immune system and reduce inflammation causing allergies. Here is a link where you can find out more. I recommend 1 tsp daily or Super EFA Plus, or something comparable:
http://www.rockwellnutrition.net/EFAs-Fatty-Acids_c_93.html