I can understand how important it is for your test emails to be successfully delivered. Checking your Spam folder is always a get first step to take. Are you also not seeing your test in your Promotions tab? Emails sent through Constant Contact to a Gmail address typically end up in this Promotions tab. This is where the test I sent myself of your most recent campaign was delivered in my own Gmail account. If you do not see your test in this tab - I would suggest sending yourself a blank test with an altered subject line. Some emails cannot be delivered due to content or even the subject line, so this blank test is a great way to rule it out as a cause.