Help with clot around uterus (subchorionic hematoma)

hailey • TTC after a 9 wk mc in 2013 - been with DH x 7 yrs - just found out we are pregnant on 4/1! Be sticky baby!!!! ❤❤❤
Anyone with experience with a SCH (subchorionic hematoma) - a clot around uterus?  I'm almost 7 wks, had US showing baby with heartbeat but dr said it needs to be watched closely that it doesn't get bigger.  Anyone know how long they last?  What to do in the meantime?  Thank you!!