spotting?

With my first pregnancy I had morning sickness, sore boobs, cramps all of it till my second trimester.... This pregnancy I really have had no symptoms besides extreme moodiness (which is because I am under alot of stress with my husband). Some cramping and I was nauseous for like a day and threw up maybe three four times and some back ache.... The past few days I have noticed when I wipe some pinkish tint and then a little bit alot it was red. and now kind of crampy on my left side and have a back ache. Should I be worried

... Am I starting to miscarry?. My symptoms have pretty much lessen and I know being under the stress I am isn't good either. I believe I am six weeks pregnant according to online calendar s