Hi Helen, this answer might sound strange .. and possibly won't work on a PC (though it does on most Macs). It might depend on what version of of Word you have.
Open your Document in Word, then choose Print. When the Printer window comes up, it might have an drop-down option called 'PDF' (normally on the bottom left of the window??). Click on that option and then choose 'Save as PDF' etc and away you go ...
I'm not sure about doing this from the web, but I guess you could try opening your web page, then trying to print it, then choose PDF etc etc ....
Which program did you use to produce your web page?
Hope this helps? Sorry if it's a load of p00p!
Mort