I've been working on one my sites and have reached 2 page of google then I started building links to it more agressavely and it has been almost two weeks since google dropped it to the last page and have only brought it back up ones for a day and then it was gone again to the last page of google. Is it all because of too many link building? Any suggestions. Asking this because usually it'll be gone for few days and come back with better ranking but now its just like gone, almost last page of google. Any suggestions and advice? Thank you!