The morning after pill usually results in a delay of your cycle. I've taken it twice for this yr and it resulted in my cycle being 6 days later then 18 days later. The pregnancy test says negative and if you're still uncertain you previously stated that you have 4 children. So you should be able to tell from other signs from your body whether you are pregnant from experience.
Also your pannicking can also result in a delay of your cycle. Pseudopregnancy can result from this so remain calm and wait for the arrival