This is an ambitious post, but given what's at stake during this election, I figured I would share this. Below are links of where to check if your ballot was received/counted for all 50 states + Washington D.C. I've checked mine for California and seen that my ballot has been received and counted.
Note: For Illinois, Mississippi, Missouri, and Texas, you must contact your county officials to check the status of your ballot. I've also provided links to those as well.