Cadence, when you get a faint positive on an ovulation test, you are meant to take that as a negative. the test line needs to be the same or darker than the control line for a positive.

However, when you get a faint positive on a HPT, then usually that indicates a positive pregnancy!!! I hope that's what it really means for you! Maybe test for pregnancy again in the morning and if the line is darker, go get a BT. But like Emma said, it could be a result of your previous m/c....