(TMI) constipation?

So I’m traveling right now and have been super constipated. I haven’t gone to the restroom in a week now. Sometimes if I strain a little will come out. I’m starting to get really uncomfortable. I realized I was dehydrated so I’ve been drinking more water and I’m able to pass only small hard stools. I’ve tried miralax and it hasn’t worked. When should I go to a doctor?