I have 4 years of previous experience in support roles. Now, I started working for a new company. Initially, I was told that there is some specific requirement that they are trying to map me, so meanwhile I was asked to do some testing work in a project. I've never done testing before, and there is no one to help me in that project. There is just me and my manager. So, I am the only one doing QA for this application. The application is being developed for the last 9 months, and I just started learning the application and testing by myself without any guidance. I've tested the application multiple times, atleast thrice daily, and found a lot of bugs. Now, that the application development is finished , the manager of the development team started scolding me saying that QA team(which has only me) not doing proper testing from a user point of view, and he is saying that he can find more bugs than me. And my manager says that if the application is released, and user finds new bugs, the company reputation will be spoiled and everyone will start blaming QA team.
I have no idea what's all this, but I feel pressurized. Can anyone suggest what should I do now ?