AF knocking?

So my positivity about this go around has all but disappeared. The past few days I had zero symptoms whatsoever. However, yesterday I was a bit achy and emotional and today I'm having these weird very low sharp shooting cramps in my uterus area, almost feels like something pulling. They've been going on since this morning, will last a minute or two and then go away. I tested this morning (12do) still a BFN. I'm trying not to lose all faith in this cycle but I feel like unfortunately I'm out again this month. I just wish I had some type of sign that if this isn't the time of what I should be doing or whatever to get myself ready. All in all I know it's not up to me and at the end of the day I have no control over when or if (that's really hard to say) it ever happens, but this is definitely the most frustrating time of my life and if my faith has ever been tested it is definitely now.