What do implantation/pregnancy cramps feel like?

Ashleigh • Gave birth to my first on 2/21/15. Lincoln James. 💙
I woke up this morning and could have sworn AF had shown up. I was having mild cramping and just felt how you do "down there" when it starts. But, I went to the bathroom and nothing except a little bit of creamy CM. Not even a little bit of spotting. And my temp hasn't started dropping yet. Still well above cover line
​I've been cramping off and on (very mildly) since about 6 DPO and I'm 10 DPO now. I usually don't start cramping until the day AF starts.
​What do implantation/early pregnancy cramps usually feel like? 
​I hope that's what I'm experiencing but I don't want to get my hopes up!