I forgot my security questions and I don't have a rescue email.

You need to ask Apple to reset your security questions; this can be done by phoning AppleCare and asking for the Account Security team, or clicking here and picking a method, or if your country isn't listed in either article, filling out and submitting this form.

Creating a rescue email requires supplying two of the answers. They wouldn't be security questions if they could be bypassed without Apple verifying your identity.