Hi, recently I built my 1st niche site, the main keyword competition is medium and it has 1K us monthly search. I have been making money in some other ways in online, but this is 1st time I am working on amazon affiliate program. I learned everything by following top marketers. So, even I have little experience before but I am confused if I am doing the things in right way. My site is 4 months old, 1st two months I did nothing, filled the site with high quality content, about two months ago I made 1st backlink, after that I am doing seo constantly, recently I bought a some PBN links, so there was some positive movements of my keywords in serp. The 2nd main keyword reached few days ago in 2nd page of US google for #14 spot. It was there for few days, suddenly my serp checker showed me alert that it can not find that keyword in that position, I checked and found nothing, I thought it is normal, as it happened with some other keywords too. they were vanishing from serp and coming back after 2-3 days in better position. But this one is different, still no change, and today I found with another serp checker( it can check serp upto 200 spots, the previous one can only 100), that my site is holding #174 position, what broke my heart totally. I am affriad my hard work is going to fail even after a huge investment on contents and seo. Any suggestion from anyone, is it normal? if it is not normal how to recover this? Thanks in advance for any kind of help or advice.