discouraged...

I have been a Registered Nurse for two years at a Urology Office Based Surgery Center. I was a Nursing Assistant for 5 years in the hospital on the post-surgical floor and I worked a bit in the float pool. I am currently working towards my BSN. I'm a single mom and I commute very far to work and I am just exhausted because of it. I was just starting to begin looking into the idea of getting a new job and I posted my resume on LinkedIn. I received an email from a large Urology group looking for a Registered Nurse for their new office that was opening (one of the doctors from the group was going to be opening an additional office to use for urogynecology). I decided to accept an interview and it was very laid back and the Human Resources director was very nice ( and happened to work at the hospital I had worked at). She didn't ask me any crazy questions that I struggled to answer. We talked a lot about my experience with Joint Commission because my current office just received accreditation and I was involved in the process. She told me about their tuition reimbursement program, their benefits, mentioned being aware that I will need to give two weeks notice at my job, told me about salary, and asked me to stay 20 minutes to meet with their Executive Director. The Executive Director mentioned me possibly meeting with the doctor one day after work at my current job. I thanked them and left. I followed up the next day with an email thanking them for the interview, stating that I am very interested, etc etc. It has now been two weeks and I haven't heard anything at all. I am very discouraged. It seemed like they were giving me all of the details and they were speaking as if they would hire me. I don't know if they are just interviewing other people ( I was the first one because she had contacted me before even posting the job), if there is a delay because the office is not technically opened yet, or if they are just not interested in me. Any thoughts? How long before I completely give up hope and know they aren't hiring me. The job is still posted on careerbuilder and I know from talking to my mom (Shes an OR nurse that works with people who know the doctor) that he hasn't officially opened the office at least ( I don't know if anyone has been hired for either RN position). I plan on sending my resume out to a few other places but was just trying to see if I could get this job first.