I get asked this a lot.
You need to persevere and know that even 18 days is an extremely short amount of time to be selling on Fiverr. From what I can remember, it took me just under two weeks but this is not the most important part.
What is important, here, is that you keep a positive attitude and look only to yourself to get ahead on Fiverr.
I would recommend that you share your gig with family and friends - I am sure one of them could use your gig for something. When you have some reviews, people will feel more comfortable placing an order with you.
Honestly, this is all about time, patience and work. My last piece of advice is not to look to other people/sellers for help and to focus on impressing your customers when they come. Show them that you care, go the extra mile, provide exceptional customer service and forget about the money - that will come later.
Best of luck