Missed a period and later that month I was feeling very nauseas but i never took a test i was spotting for about 3 days (assumed it was my period) very lightly and 4 days later i got this horrible back and abdominal pain it wasn't like normal cramps so i went to the bathroom and started gushing blood (brownish with some clots) as if it were a really heavy period but the pain was horrible. It lasted for about 4 days and then stopped but i didn't get my actual period until almost two months later and my period has always been very regular. Could that have been a miscarriage?