miscarriage?

I'm kinda freaking out. I took a pregnancy test last night and the test line was WAY darker than the control line. Took another one this morning and the 2 lines were pretty close in color. The control line might have actually been a little darker than the test. I'm supposed to be 6 weeks exactly today. Anyone had this problem before and everything been ok. I was having a BM yesterday and there was some pink when I wiped but nothing since. There were cramps all day yesterday but nothing strong. Also only symptoms I have had this far is tender breast. That one symptom was gone this morning. HELP PLEASE. In need of prayers this morning!!!