Since You're Wondering

I'm sure you have been...

The Y-DNA and mtDNA tests have backed up the Ancestry.com test.

From Africa my mother's forebearers (Haplogroup H) marched up through Central Europe over to Denmark, Sweden, and Norway. Read a BBC article on the mtDNA testing of ancient skeletons here.
I'm betting we are either subclade H1 or H3 - the first and second most common subclades of the H group. Should you wish to learn more, read this.

Determining the subclade is another damn test.

My father's peeps (Haplogroup R1b - most common haplogroup in Western Europe) did much the same; a slightly different route though Central Europe to Denmark, then popped over to the British Isles (more than 80% of  people in the Scottish Highlands, Ireland, and Wales have the R1b marker). Read more here.
As with the mtDNA, the Y-DNAsubclade test is more dollars.

The "uncertain" 2% is still unsolved...