I've had tiny spotting off and on throughout the first trimester. Then last week I had massive blood loss on Wed night but it had stopped by the next day and turned to brown discharge. Called doc and was out of pelvic rest for a month.
Call a doctor for sure if you're nervous but know it's normal too. People just don't like to talk about it. Abstaining from sex or masturbation can help avoid bleeding. And laying down with feet up in the air.
Hope this helps.
If it bright red and heavy and u are experiencing pain you should get urself checked. If it is just a little spotting it may just last a couple of days and b nothing to worry about.