Implantation or Period After Miscarriage

I have yet to have a period since my miscarriage in November. I successfully passed everything and bled for less than a week. On Monday I had cramping all day long, yesterday I had the slightest of dark brown blood showing on my panty liner along with mild cramping in my lower abdomen. Today the blood is still a very light amount and brown, like a quarter size over four hours into a pad. Is this implantation bleeding or the start of a period. So unlike my normal periods and super confusing. I am so nervous to take a test! Thoughts?