No Rsvps for sons 8th bday?!

Jackie • Hey! I'm Jackie. Im 28 and married to an amazing man named Ron. Settled down in Massachusetts but a Cali girl at ❤. We have two crazy, wonderful and amazing little boys. Pregnant with baby #3!
I wasnt sure where to write this but I was wondering if anyone had any advice? My sons bday party is gonna be on the 6th of Aug and he passed out invitations during summer school about a week ago. This is the first party he's been able to have and invite friends from school to and noone has rsvp'd yet! Im a bit anxious about this because I know how excited he's been and I dont really have parent's #'s due to us being new to the area. It would break his and my heart if noone besides family showed up. What should I do? Send more invites? Reminders? 😩