I had a similar experience, had light bleeding for about 1 week plus but no cramps. I was about Week 4 when I went down to my gynae to get an ultrasound done to check. But the doctor suspect it was still early into the pregnancy. Also did a beta HCG test on that day and another test two days later to check if the levels doubled. Thankfully it did. Now am at Week 9 into my pregnancy. All the best! Take it easy, rest, and try not to stressed yourself out too much.
squirrelg3