Last month, I think about 15-17 days into my menstrual cycle (not sure exactly, I don't keep perfect track) I started feeling a sort of not-exactly-pain, more like slight pressure (hard to explain) on the right side of my lower abdomen. It lasted 2-3 days, then went away. Well, yesterday, it came back, same side, same "slight pressure" feeling. I did some Googleing and I figure it's mittelschmertz / mid-cycle pain. However, I'm 22 years old and I've never had any sort of mid-cycle pain before that I remember. I was just wondering if this is normal mid-cycle pain or if it sounds like symptoms of something more serious. I read on Wiki that your lymph nodes can swell, maybe it's that? I haven't been to the doctor since grade school, so I'm always paranoid of secretly having some dread disease that's killing me. If I could get an answer from someone who knows what they're talking about, I would greatly appreciate it. Thanks!