I can see it too. Late implantation is not as common but it does happen. Also, considering your weird period last month it could be Decidual Bleeding, which is the partial shedding of your uterine lining.
"The quick hormonal shifts that take place during the early part of pregnancy can cause ovulation - the release of an egg from the ovary - or they can cause the thickening of the uterine lining despite the fact there is a fertilized egg present. Around the time when the woman would normally have her menstrual period, the lining is shed from the uterus and it appears as though a regular period is taking place. If there are accompanying signs of pregnancy such as sore and swollen breasts, nausea, and fatigue, it is important to take a pregnancy test, even if menstruation seems to be normal. If a home pregnancy test shows a positive result, consult a doctor to have a blood test which will confirm a pregnancy."
Fx crossed for you.
afm... I took another hpt here at work lol and now it is even fainter! I knew it would be with such diluted urine..ugh! Why did I do this to myself! But my abdomen has so much pressure in it I had to unbutton my slacks in my office LOL!!!! Any of you girls who have been preggers before remember feeling pressure in your lower abdomen, like the panty area?