Its a decision only you can take, but bear in mind, if you DONT take action and come to an arrangement with your creditors, and miss payments, and gradually become worse off, your credit rating will suffer anyway- and they can rightly claim you have ignored the problem and been irresponsibe.
If you do take action, yes, it will show on your credit record, but you will be able to demonstrate that you are tackling the problem, which is far more responsible. Plus from personal experience, you will feel ALOT better once you have a plan of action and are making headway.
Dont be frightened off by the creditors playing up the ngative effects, its in their interests to try and get their money back asap, so they will initially try and scare you.
The only other alternative if you dont want to go down an agreement route, and you cant pay enough off on what you earn, is to take on as much extra work as you can fit in your time, and spend as little as possible. Its hard graft and it will make you tired and effect your social life, but its the only other way! I worked Mon-Fr in my regular from 8-19.00 then from 7am- 19.30 Saturday and Sunday every weekend for 2 years in a second job, and did casual catering/waitressing in the evenings during the week..
Its not for everyone, but it took some of the financial pressure off me, and the other bous is if you are working all the time, its really hard to spend!