TWW- prego or PMS?

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Is it just me or are the symptoms very similar? My boobs are sore and huge but they are every month before my period. Is that period cramps or possible implantation? Anyone know a way to distinguish between the signs? I could just chill out and wait but we all know how hard that is. Also, I can't enjoy a glass of Pinot if I might be prego! 😂