Spotting more than once - 10wks and 6 days

Hello, 2nd time mommy here. 33 yrs old and I'm having spotting. It has happened more than once. Sometimes it's just a little pink tint in otherwise clear discharge. Other times its pink with no discharge. At nearly 7 weeks I had this happen, went to Dr, they checked hormone levels and did a sono. Baby looked good, heartrate was 150bpm, levels were not exactly doubling though. I'm 10wks and 6 days today, and I've spotted for two days in a row. Only in the am and not much. Today I am having one sided cramps too. This baby seems more sensitive than my first. I was in college ROTC with my first and would run 6+ miles every other day, along with rigorous workouts and lots of walking around campus. With this baby I was told not to run, and even if I try to just do light weights or just vacuum I get spotting. I feel like a China doll, and I try to be as non mobile as possible to keep the spotting from happening. Can anyone relate? What am I doing wrong? I am not being hard on my body and I'm eating decently (lots of vomiting ) if anything please keep me in your prayers. Thanks