I just left a company that I was at for almost 5 years for a much better job (double the pay, responsibilities that are more closely aligned with my skillset, etc.). I had a couple reservations about it (required 10-20% travel every month and one of the two managers that interviewed me was aggressive and somewhat rude). However, the other (much higher up) manager was extremely nice and seemed like he really wanted me to work for them, so I went for it.
Now, barely more than a few days after starting, I am under constant pressure. Prior to being hired they promised to work with me to minimize the travel requirement, but now they are saying it's needed. I also found out that the health insurance doesn't cover most common doctors or walk-in care centers in my area since the company is out-of-state.
I'd like to start applying for new jobs again, but I'm afraid that quitting after a few weeks will look bad to any prospective employers. Is it likely that my 4-5 year job will help balance that out or is there anything I can do (add something to my resume?) to make myself look better?