If you and your SO are no longer together : CHANGE YOUR PASSWORDS.

take the advice as given so far, and just run some security tools across your box.
If you are new to this, then the following link might help.
A guide to cleaning

It is rarely the worst case scenario that has happened.
Just try to post details as requested, with details edited :
ie: [email protected] to [email protected] to hide any mail addresses.
Any more info required, just ask.

Pax