Hair Loss, Rash, and Allergy Problems

I have had allergies to mold, cat, and ragweed for about 12 years. In October, 2008, I had a major allergy attack. This was followed by huge hair loss and a ringworm like rash on my chest. The rash left after using steroid cream (tried A LOT of natural supplements before this, but didn't work). Now, the rash has returned - it seems to get worse and brighter with heavy exercise (weights or light aerobics is ok). Hair loss has been continual - seems to improve for awhile, but with stress gets worse. Allergy problems vary. I'm ok right now with sinus, etc.

Personality - I am VERY introverted by nature. If I feel comfortable with someone I can be quite talkative. However, if I feel uncomfortable in a situation, I will be completely silent. Many folks take this as snobbishness, but unfortunately my tongue is totally tied in some situations.

I have had A LOT of stress for 4 years now. The stress seems to be that I am in constant situations at my childrens school with people who are a lot more outgoing and partying type than us. They are very unfriendly with me, which causes a LOT of stress to be around them. I seem to lose more hair after I need to spend a weekend around them. My job (I.T. work) is not stressful to me - I work with many friendly folks. The actual work is also not stressful. Only stress at work is my company has been bought out several times.

I have always been very shy, but some people do not see me as shy. I can feel VERY anxious in social situations - lots of worry about being judged - am too sensitive. I am a fairly organized person (not too organized), and average level of tidiness.

Can anyone help with my hair, rash, allergy, and stress/anxiety issues, please? Thanks!