Words of comfort needed

I don't really have many women in my life to give their advice and share their experiences with me as I'm I the early months of ttc. My husband and I did the BD and I started feeling like my period was coming, but then the symptoms were completely different! I was getting back pain, super light cramps, two days of headache, fatigue (I even took a nap)and tingle in my breast. My husband recommended a Doctor's appointment cause of how different this all was. Went to the doctors to explain and was told just pms and was sent home with a BFN. I'm 7DPO and just kinda feel defeated. Anyone else have a similar experience or advice?