DIET PILLS... WHICH ONE TO TAKE???

I have recently started a diet (7 days exact) and I have a great start to it... 6 pounds GONE!!!! I started with fat free or low fat items.. Of course i am eatting either chicken, tuna, or ground turkey... Lots of veggies and fruit.... Oh and boy do i have a sweet tooth -  so i have to keep alot of pears in my house.. They are the best!! Anyways, i started also taking Slimquick 7 days ago - this is the one with green tea in it.. Not Hoodia.. Anyone out there care to tell me a better pill to be on, that WILL NOT make me jittery!!!! I cant stand the jitters!!!! I wish to lose about 30 lbs so that i can fit into that SWEET bikini this summer and not be looking like a lake whale....