I did send a Thank you e-mail

. I have no idea on the timeline for other ppl that have to be interviewed before they make a decision, and I hope they all decide to give me a chance,
Email is a useful tool for communicating job details, updates, etc. Save the thank you's for something more memorable and personal.
Here's a tip:
STEP 1: Go to Hallmark. Buy a 10-pack of "Thank you" cards. They have some that are designed to appear very business/professional and come with envelopes. As you meet with managers, supervisors, or anyone influential of their decision in whether or not you will get a job there, collect either a business card of theirs or scribble their name and title on your "interview portfolio" notepad. (Interview portfolio = a small leather bound folder usually found for less than $15 in a Staples/WalMart. Carry paper, a pen, and resumes in it.)
STEP 2: The minute you leave your interview, stop in at the nearest Starbucks, bar, wherever and write out your cards. Comments made in your interview will be fresh. As soon as those are done, turn right back around, walk into the front office, and drop them off with the receptionist.
BONUS/OPTIONAL STEP: Receptionists are like a concierge. If you're uncertain as to whether you've over/under dressed for an interview, they would be the ones that could likely help you make that call. I've had one hold my coat and tie for an informal interview. Be friendly. Some are busy, some are all smiles, but most importantly they can also provide you very good insights into the morale and way of life at the office. Receptionists can be the gateway to some companies believe it or not. They deal with everyone from the top down and are pretty good judges of character. Thank them for their time. If they truly helped you, I've even gone as far as leaving them a thank you note with a $5 Starbucks giftcard. It's a very memorable gesture and will place you well above the common interview candidate.
STEP 3: Begin drafting your "follow-up" letter. Interviewing for jobs, well, is a JOB all by itself, so don't skimp. Send a follow-up letter 1 week after your interview to reiterate your gratitude, but to also express a continued interest in the position. Include another copy of your resume.
In this day and age jobs are very hard to come by and there will be many more candidates than ever. If you qualify for a position and interview well, then yes - you might get the job. I once interviewed for a single position with 350+ candidates. I got the job. Why? It's because I did more than just sell myself. I made an impression and went out of my way to ensure they knew how much I appreciated their time.
Best of luck with the job. If this one doesn't pan out, don't dwell on it. Look forward to your next interviewing opportunity. I, myself, will soon be back in the mix looking for work back home and have not only been turned down more than a few times, but have also managed many jobs in just a few short years.
All the best.