Faint BFP

Took a test yesterday and it was faint but it was blue dye so I can't trust it. Af due tomorrow and I've been terrified every time I've been to the bathroom today. I felt slight cramping. And my boobs have been hurting for a week straight with burning nipples. Hoping they aren't just PMS. And The stinking store was out of pink dye. I'm so scared. We've been trying since August of last year with one miscarriage. Just spent a month in Europe I'm hoping all the BD there paid off this month but can't help to think it didn't. It seems like everyone I know is announcing pregnancy or having babies and I'm in such a funk.