I am 14weeks3days prego. I have a question about some light pain/cramp/discomfort on my lower left abdomen??

Since 2 hours I have been feeling a light pain feeling on my left ab, it's actually on my lower left side at the bottom. It is not cramping or hurting too much. I just feel some soft pain/discomfort rather. I am wondering if it can be my baby moving around. I know it is probably too early to feel the baby's kicks cause i am not feeling anything when my hand is there. But i asked the office manager at work and she said she could feel it's a bit swollen on my left side and she says maybe the baby's butt is there against me. Could it be possible to feel the baby so early before the 18-20 week time? And what does fluttering and light baby movements feel like, what I am saying…or something else? Please let me know!
On another note I just had the baby's heartbeat checked by the OB on wednesday and it was at 150bpm. OB said it sounds healthy and fine!!