Should I take a pregancy test?

So I started bleeding well more like spotting the beginning of the month for 3 day. Normally I'm inbetween normal/ heavy, which I thought was odd. But the past 3 days I've been wanting to go for a wee a lot, even during the night. I also feel bloated after eating, plus ive been feeling so tired lately I don't know if it's all in my head. I also have a daughter but I didn't know I was pregnant till 13weeks as I didn't have any symptoms. Can you spot bleed for days and still be pregnant? xx