I ate a little bit after taking miralax (polyethylene glycol). i take it in the morning but have never taken it at night and eaten afterwards. everything will be normal tomrrow right?

Should be: In spite of the catchy name mirilax is less of a laxative and more of a wetting agent. Instead of making your bowel muscles push the poo around like some laxatives, it just refuses to let the water it absorbs be removed, preserving the wetness of your poo as it moves through.Too much of anything can make you loose, but i wouldn't expect a blowout.

It is okay: And it is likely that you will have a softer stool in the morning. Remember drinking plenty of fluids, eating fruits and vegetables and food containing whole grains will reduce your constipation.