Help! Faint positive DST but...

I had a positive dst at 12DPO now I’m 1 day late 15DPO and I’m sure this is negative. I NEVER have sore breast ever and they have been so painful since 9DPO so I’m confused!! The last time my breast were this sore I was pregnant with my first. Also been extremely thirsty especially in the middle of the night, vivid dreams, mild cramping. Is there hope?!? HELP! I have been TTC for 4 months for our second

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