Don't cry gorgeous. I'm waaaay too hormonal and will have to join in! I reckon give anything a try. If MummaSue had luck with tablets, you've got nothing to lose by trying them.
You don't want to know when DD2 grew out of it, but as for creating bad habits I don't think so. E is almost 4 now and is a fabulous sleeper. Both my girls have had various amounts of co-sleeping, but I couldn't tell you the last time I had to deal with one of them in some way during the night. They go to bed around 7.30pm and I don't hear from them until at least 7am the next day. I'm a firm believer in you need to do whatever it is you need to do to cope with the here and now - tomorrow, next month, next year is a problem for then.
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