Is it normal to bleed during early pregnancy?

I did a check last sunday and found out this. It is a positive rite? But since monday i have been having cramps like those menstrual cramps but not so severe. I do notice some brown spotting as well.. but the next day, i was bleeding the whole of my pantiliner was soaked with blood just like menses blood. I am worried. Am i pregnant or false alarm? Anyone experience bleeding like me before?