Pregnancy progress

Julie
Hello everyone. I need help. So last time i had a period was 3/16. Took 4 pregnancy test and all came back positive went to the dr this past tues and he confirmed the pregnancy. He told me to come back in 3 weeks wen ill be 8 weeks along to hear the babys heart beat and check my blood results. For the past couple of days ive been noticing that wen i go to the bathroom and wipe the slightest brownish discoloration shows up on the tissue like wen ur at the end of ur period. So me being worried i took another pregnancy test today (ept) and it still came back positive but it was very light and now im slightly panicking. I dont have any pain or cramping or blood. I dont know wut to do.