Could a wheat allergy cause pain, flushes and skin rash?

In 2002 suddenly started to suffer with very achey muscles and was told that I probably had fibromyalgia. Over the years the pain has waxed and waned but has got very much worse in the last year. I now have very stiff and painful joints as well as painful muscle aches. A weird purple/red itchy rash has appeared on both my arms and for the past few weeks I have been feeling "flu like" and have been getting what I presume are hot flushes. The doctor has said the rash is neither eczema nor psoriasis and is baffled and has given me a steroid cream to put on it - so far no improvement. I do eat alot of bread and pasta and just wondered if all my symptoms could be wheat allergy? Maybe none of it's connected. I am 57 and had a hysterectomy when I was 33. Could it be menopause? Any advice would be very appreciated. Many thanks.