Pinkish to brownish secretions

Irish

The app said I’m 6.3 weeks pregnant based on my last menstrual period. when I wiped that day, I had like pinkish secretions. I’ve been having back pains since the night before so I went to the urgent care and they did a trans vaginal ultrasound and drew my blood HCG levels. They found a sac but it was only 2mm which is =2-3 weeks. My HCG levels were only 136 which is again=2-3 weeks pregnant. At the end of the day, it was only a scanty brownish fluid on my panty liner.

I’m scheduled to repeat my HCG levels after 3 days and another ultrasound after 4 weeks. I’m hoping I can continue this pregnancy. 😢🤞🙏🏼