I think the Jan 10th bleeding was probably ovulation bleeding. Probably lighter overall? So usually we do not bleed at that time but some spotting and for some women heavier bleeding is common. I spotted this month when I ovulated for maybe the second time in my entire life that I know of, so you just never know you may get a surprise like that.
Some women have this as a regular pattern and it seems like close periods--about every two weeks. It most likely doesn't mean pregnancy. You could test anytime to check if you really want to but I would say don't bother.