my husband and I have been married four years. we have never used birth control. I have never been pregnant, i have gone to my gyno, had a vaginal ultrasound and was told everything is working properly. i have been charting on glow for 6 months, but this is the first month that I felt my ovulation schedule synced up with the app. Today I am six days late. during ovulation week, we had sex every other day. over the last week I have been very constipated, had unusual headaches, dry mouth and odd tastes and in the last two days food aversion and nausea. also maybe it's just psychological but I feel that "flutter". on Monday I took two blue dye tests and BOTH were invalid. no control line at all. tonight I took a pink dye dollar tree test and it was negative. how can it be negative and have all these symptoms? am I just crazy??