Am I pregnant??

Hello everyone!

My period was due there on the 27th October and didnt come on time, the week after all i had with blotches of brown blood which was quite thick but small amounts for maybe a 2-3 days. That ended and now last night i peed and wiped and there was a light pink blood stain on the loo roll. i have sex with my boyfriend without ancondom all the time as for some reason he cant ccum( he can sometimes) when should i take a test? i took a test when i was getting the brown blotches but it was negative