Hi I discovered that I had a tumour back in September this year, the first visit to my doctor (female) she just dismissed my concerns saying it was just related to my menstrual cycle (no examination or eye contact wow how clever was she

) after persisting and seeing a nurse who did take me seriously I was sent of to the hospital and to cut a long story short eventually got the diagnosis of BC.
I had a lumpectomy and waited for test results. there was no lymph involvement, the tumour was 2cm and they got a clear 2mm area around during surgery, but it tested positive to HER2.
I had my first cycle of FEC 75 a week ago tomorrow and even now feel sick to the stomach about having to go back, I am finding the diagnosis really hard still and was wondering if anyone had refused chemo in a similar situation? I wanted to say no but am terrified of it coming back yet terrified of the side effects ect of the chemo.
also how and what happens during radiotherapy? and herceptin as I have these after chemo.
has anyone used the cold cap with FEC75?
thank you in advance for any advise it will be appreciated