normal or miscarriage?

Last week i took an upt test n the result turned positive with 2lines (my first pregnancy). I had cramping and backache for a whole day since last week. N this morning, i got bleeding but i notice the blood is not like my usual period blood(brownish+light red). I can't go to clinic at this current moment bcs of pkp. What should i do? Is it really miscarriage? I'm scared n i have no experience pls help ?