I recently started an implant process and a few days later had collagen placed on the site. I now have a bad taste in my mouth?

Placement of a collagen a few days after an implant procedure is highly unusual and not part of a routine treatment process. Why was that performed in such a fashion? Bad taste could be indicative of infection. It is best to see a surgeon to have the site evaluated. Meanwhile, oral rinsing with saline is recommended.

Good for you for accepting the best treatment for missing teeth! I am confused by your statement about collagen placed on the site a few days later; however, if there was a membrane placed, the material usually does taste pretty bad. There are different kinds of membranes placed along with an implant placement based on whether or not the gums will completely cover the surgery area. If the area would have been slightly uncovered, a specific kind of graft would be placed to seal out bacteria that can prevent good healing. Usually those grafts are removed after several weeks along with the stitches. If you are uncertain, call the dentist who placed the implant. Good luck!