Your age is not the main issue, but the status of your health is, and where you're travelling to plays a big part.
You're going to a Non EU European country, so that's no big deal.
Try this- we do;
Travel Insurance | Holiday Insurance from Atlas Direct
Edit- a simple search revealed this pearl of info;
http://www.nhs.uk/NHSEngland/Healthc...itzerland.aspx
In it it states;
Your European Health Insurance Card (EHIC) allows you to access state-provided healthcare in Switzerland at a reduced cost and will cover your treatment until you return to the UK. It also covers the treatment of pre-existing medical conditions and routine maternity care, provided the reason for your visit is not specifically to give birth. No cost participation is required for maternity benefits.
Are you planning to use the maternity benefits?