The fear of many people is that their email has been hacked and they might not even know it till it is to late. Personal information, pictures, credit information and just your sense of security can all be stolen. There are a couple of things you can do to check your account, one is simply checking the information on your page and the other is a great website that you can run your email address through.
1) If you have google mail it is easy to check the history of IP address used to access your email. If someone other then yourself is accessing it then it will show that persons IP address. Lets start from the beginning.
A - Open your gmail account
B - Scroll down to the bottom of the page
C - At the bottom right hand side there will be the words "Last account activity" with the number of minutes or hours it has been since your account has been accessed. Under this is the word "Details" and it will be underlined. Click on the work "Details"
D - A pop up window will show on your screen and it will give you details of when and were your account has been accessed. If you are the only person then you can feel at least safer that you have not been hacked.
2) There is a web site that takes all of the email address that have been openly hacked, places like Yahoo, Sony and Adobe of all had user information hacked. Adobe (best known for PhotoShop) lost over 150 MILLION user information to hackers.
Thankfully there is an easy solution to check if your email information has been compromised. http://haveibeenpwned.com/ covers many of the companies. It only asks for your email account and you do not have to give it any other information. When you enter your account it immediately tells you if you are safe or if you need to change your passwords.
I hope this has helped.
