Lymph nodes

So my lymph node on the right side of my neck swelled up last summer. It was pretty swollen then, but it’s basically gone down to the size a little bit bigger than a pea. I didn’t think much of it, I just assumed that maybe my lymph nodes drain a lot slower than other peoples. But now, I also just recently found a small lump in my right breast. It appeared right when I started my last menstrual cycle. My mom thinks it’s a swollen gland from when I was on my period, but I’ve been off my period for about two weeks and it hasn’t disappeared. It’s not as large now, but it almost feels like a small almond. I messaged my doctor and he said to keep an eye on it. It’s not painful at all. Any idea if I should be worried? Thanks 👍🏼