thank you everyone for your comments. ever since i discovered this website i've been on it atleast a few hours during the day.
UPDATE: after the two damsels died, i went to a fish store in SF 1 day later where there was a firefish for really good price, i was told they were very hardy. i purchased the fish and an extra of 10lb of live rock (17 total now). i woke up this morning to see the fish dead on the sand, no damages to the body. NO MORE FISH FOR NOW until I get this cycle going. I'll definitely take the advice of being patient for now.
i tested my water today and ammonia, nitrate, nitrite all are at "low levels" according to the lfs. the only concern was the ph level being at 7.2. she sold me a buffer to adjust this ph. i've been observing my tank very closely and carefully especially when i was adding the new rocks. i highly doubt that i have a mantis shrimp or even bristle worms in the rocks. i used a red light at night and watched it for hours after placing some food and did not see anything.
as of now: i have 17lb of live rock, and a dead firefish in my tank. should i remove it or will it be good for the bacteria?
btw - i think i have some ok circulation the pump i have is a powerhead 402 which is relatively strong (moves my sand around).
can someone give me some suggestions as to what i should do now? just wait and get more liverock?
thanks again everyone!