There are a number of reasons why your alarm system could have been activated. It does not always mean that there has been any criminal activity. That said, you might want to request that a security company, rather than you, attend.
Not everyone will feel comfortable with the idea of attending their premises when the alarm is activated. This is particularly true if it is in the evening, or if you will be alone. By instructing a company to act when an alarm is activated, then the worry is taken away.
You won’t have to put your own safety at risk, instead, a trained member of security staff will be instructed to attend the call out on your behalf. They will also be able to keep you updated as to any issues. Particularly after they carry out a full check and search of the building, ensuring that there is no damage, theft or criminal activity occurring inside. This will satisfy your insurance company about lone workers and keep you safe.