Anything is possible, that's why they test you several times. Are you in a high risk category? If so, then make sure you follow the doctors directions to be sure and stay safe.
It can. Just make sure that when it comes to HIV tests, you go to a trusted health center.
It is very rare that HIV test can figure out about the wrong conclusion. If the tests are fluctuating between negative and positive. You should take a second opinion form another doctor.
Yes get check 3 times after one rite after net 1 30 days if its pos then you have.