Tamoxifen side effects?

Hi, I've been reading this whole forum on Tamoxifen and yours stuck out to me the most. I feel like I am reading about myself. All your symptoms are what I'm getting/how I'm feeling. I've been on it for 3 months and have never felt like this before. The tiredness, the moodiness, and the fuzzy head. It drives me insane. I have two beautiful children aged 11 and 8 and I feel they are indeed on the receiving end of my moods. I know it every night when I go to bed and in turn feel guilty, and tell myself that in the morning I will try super hard to be happy and positive, and think positively about things, but it doesn't take long and I've hit the ground again.

I've also returned to work after a few months and I feel absolutely exhausted but feel I don't have much option financially. 

I was diagnosed back in June 2014 at the age of 31. I had a lumpectomy and my lymph node out but the cancer hadn't spread. I had 4 weeks of radiation and then started the Tamoxifen. 

Did you perservere with the Tamoxifen? I'm feeling exactly like you. I feel like if I stop then run the risk of cancer again so guilt gets me, but I feel so shit.

Looking forward to hearding from you.

Bec