My toilet is currently clogged, tried a 3' snake and plunger and the clog won't budge however whenever I run water in the bathroom sink I get a gurgle/bubbling in the toilet. I understand these two can be connected so not sure if that should be any concern on a normal thing. My question is after trying both a small snake and plunger and giving the situation would it be better to rent a larger snake or will this job require professional help?