A couple positives followed by a negative

Rosemary

I haven’t had a period since last October because birth control messed my system up. That being said I’ve felt nauseous, have had sore breasts, had to pee more frequently, and some bloating for a little over a week now. I took the pink dye tests because they’re reliable and have had a couple positives show up before the time is even up. Today I took one and I saw barely anything. Any idea of what is going on? Thanks ahead💗