Don't panic - it is something that you need to do a few times to get the hang of. But, please do not use tweezers or dental floss - there is a good chance that you will end up leaving the head in and the tick will then regurgitate it's stomach contents with any infections (eg Lymes Disease) it is carrying
Are you using an O'Tom?? If you have read the instructions or watched the film, it is easy to use. These are the only tick removers that I would ever use - they are very easy and effective to use
The only thing is to make sure you are using the right sized one (you get 2 sizes) - if the tick has only just latched on, it will be tiny and the larger hook will not get it.