Suggest Treatment For Lower Stomach Pain And Brown Color Spotting

Hi, I had embryo transfer two weeks ago. Since than, I am at home, have a rest and doing nothing. Yesterday I had a small pain,and today too, like I will get my period. Today I saw some small and light signs od blood, on the remainings of the gel Crinone, it is the first sign after the embryo transfer. I do not have any other sign, my brests were painfull last week but not any more. Can you tell me what is the meaning of those red-brown dots and pain in the lower oart of my stomak. Pregnancy or period? Thanks.