Is this a sign of being pregnant of implantation of the egg?

TTC#1 tested a LH surge using opk 5/5/11 BD friday 6/5/11 and sun 6/5/11, i know it's too early to test but have been constipated for 3 days now even though i haven't changed my diet and am usually very regular (daily) i eat alot of fruit and yesterday i even ate a bag of prunes and had weatabix aswell as red grape juice, also the day i tested the LH surge i took note of my cervical discharge it went away and i noticed it again today? also today i have been very emotional and snappy with people. is this a sign for anything at this stage ? any answers welcome, hopefully someones experienced the same in this situation, i hope i'm not over reacting.