My 11 year old westie has been vomiting for 24 hrs,no blood/no diahorrea,he is drinking OK but he has no started shaking advice please

Get him to the vet right away...

Unfortunately we cannot diagnose on this site but I can tell you from all that vomiting there are quite a few things that could be wrong from poisoning to a blockage...
Shaking is usually an indication of pain.