Value 1 is attested for the 19th century, but not in the 18th-century sources.
With other situations, the experiencer is found in subject position in the 18th-century sources as well; e.g. Cato kiesie koorsoe [Cato get fever] 'Cato got a fever' (Weygandt 1798:127)
With 'fever', the sensation can also be in the subject position (Value 2), e.g. koorsze de na mi [fever COP at 1SG] 'I've got fever' (van Dyk c1765:74). We did not find similar cases with 'headache' though.
See also Examples 190, 191, 192, 193 with Feature 77 "Predicative possession".