Visible Fluttering in lower abdomen?!?!

For two months my husband and I have been TTC. I am 10 DPO. I know it's too soon to take a test and if I do I will only be getting my hopes up. I have had nausea and cramping for 3 days now but could also be a sign that AF is on her way. However, I was just laying down and I saw and felt my lower abdomen twitching. The best way to describe it is that it was like feeling a pulse or seeing a gentle heart beat. It was visible enough that I was able to tape it the gentle movement. I have a 10 year old and don't remember any thing like this happening. Now I know I am not "feeling the baby move" I'm just curious to if anyone else has experienced this. I just thought it was weird but interesting.