I’ve mentioned this several times, but it bears repeating. If you haven’t contacted your legislators about SJR-7 (or even if you already have!), you can do so in a number of ways.
Two sites have easy contact forms you can use, that look up your legislators for you based on the information you provide. You can use either or both of them to send a message to your legislator, and they both allow you to customize your message.
Stoptheamendment.org is one of the sites – go there and enter your zip code in the left-column under “Contact your Legislators” and it will take you to the form.
Indiana Equality also has a form on their Action Center that works similarly.
Also, if you want to look up your legislators and contact them directly by calling their office or sending a direct email, you can look up their contact information at Project Vote Smart. They also have a look-up by zipcode form in the left column of their home page.