Breast tenderness

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I need some help please, I had a miscarriage 11 Sept Dr saw a deflated sac and that same day I started spotting , I went for my check up on Monday to see of everything is out. Dr saw a new sac and thought it might be a new pregnancy. We did blood test and it came back my hcg level is 1.5 dr told me that I am not pregnant and that I have to wait 4 weeks to see if I start bleeding. I had clots and stringy blood a few days ago but it was only one wipe and since then only ewcm . I have extremely sore and swollen nipples, I am nauseas and my I am tired all the time, I also have lots of watery /ewcm. Has anyone ever had this happen after a miscarriage?