Hi,
Tying of the fallopian tubes by any method either burning or clipping the tubes, it is a permanent method of sterilization and a pregnancy is not possible after that. To know whether the tubes were actually tied, you can do a HSG or hysteron-salpingography. This is an investigation in which a dye in injected and the patency or blockade of the tubes can be noted. Hope this helps.
The answer is based on information provided. Exact advice is not possible without a proper examination and investigations. You are requested to consult your Doctor. Take care and keep us posted.