hi there, you seem to be very eager to be pregnant. Loose stools or no cramping is no evidence of pregnancy
and the best thing to do would be to wait for a week if you do not get your periods then repeat the pregnacy test and if required get an ultrasound
preferably transvaginal or a serum HCG
levels done to confirm pregnacy, in the mean while take plenty of fluids, soft diet
, probiotics and see if your loose stools stop and if reqired get a stool exam done for ova and cyst
or any bacterial infection in case the symptoms continue for more than 2 days. Take care.