Waiting for breast clinic appointment

Hi. 
 

im Kaz, I'm 39. I went to the drs in November as I had mild chest pain, a bit like a pressure, kind of tender as though I've been lifting weights. I had swollen lymph nodes under my ear and I feel like the back of my head gets swollen too. I am also very tired, kind of like I wake up still yawning but I don't need to sleep anymore, I'm just lethargic. Anyhow Dr saw me and wasn't worried about the chest pain or lymph nodes and blood tests showed slightly low folate so I took a supplement. The chest pain is still there, I get short of breath at times and then I felt a small lump right at the top of my right breast, almost so high that it's level with my armpit, but central to the breast. It's small and hard to feel at times, easier if I stick my shoulder back, it amost feels like there's two little petis pois stuck together. I felt silly even mentioning it to the nurse, convinced she'd say it was nothing, but she just had a really quick, tiny feel and said she'd get me into the breast clinic within 2 weeks. She didn't say anything other than that. I'm worried now because of the symptoms that lead me to the drs in the first place. My appointment is 23rd March so it's the full two weeks. I'm currently in the middle of a degree and I'm finding it hard to concentrate on anything else. I haven't told anyone other than my husband because odds are it's nothing and I don't want to worry people. Has anyone else experienced a really achy chest? Almost feels like it's going to hurt if I take in a deep breath. Thanks for listening to me ramble.