Could it be swine flu without a fever?

sorry to ask about this LOL but i am a bit concerned seeing as i am asthmatic (so little worried about catching swine flu and having complications ) . I have only started to feel a bit ill today with headache, tiredness, loss of appetite and achey arms n legs however i put it down to being in london yesterday , suppose the walking could have made me achey. But the aches are in both arms and legs now and are not going , they also feel quite strong like when i got normal flu last year. I dont feel hot at all and no cough . Could achiness be a first symptom?

Not impossible but it’s unlikely. With flu- any flu, symptoms are typically of a sudden onset. And a temperature almost always happens. Just take extra precautionary measures just in case.

Swine Flu (influenza H1N1)-Symptoms and preventive protections