2-3 weeks pregnant cramping and slight bleeding

So I am 2-3 weeks pregnant, went to the nurse practitioner at a clinic and she said that the line was faint but I am indeed pregnant... I’ve had severe nausea and headaches and a little dizzy at times. I’m noticing some light bleeding and mild cramping.... I’ve contributed the cramping to morning sickness but I’m terrified something is wrong....

we have already hade 1 miscarriage in 2016 and it started out with light bleeding so I think I’m pariniod.... how much spotting is too much and how much cramping is too much? Any advice would be much appreciated!

Thanks