TWW question..is the a possible sign of pregnancy?

So, we are in our 9th cycle of TTC our third (and probably last) baby. My oldest was conceived on the pill, and my second came after 7 months TTC. So, this has been a hell of a long wait. My LMP began on 11/14 and my cycles are 29 days long, like clockwork, and I usually ovulate on CD 14 or 15. We BD on CD 10, 11 and 13. I am now on CD 20, about 5-6 DPO. With my boys I do not remember noticing any change in my CM, but right now my CM is very different than what it usually is in the TWW. Usually, right after O day I dry right up for a day or two, and then it becomes white and creamy-ish. Then, it stays that way until about CD 26-27, then for the last two days before AF shows it goes totally dry again. Right now, I am having A LOT of CM, and its white, very thick and more sticky than creamy. Is that a possible sign of pregnancy? I can't really think of any other symptoms...I am tired, stressed and a little moody. But, a week ago my best friend's baby boy (4 months old) ped away due to SIDS. He was my God-son, so I've been a total wreck. To be totaly honest, I am almost hoping that I am NOT pregnant right now, just because if I am, my due date would be very close to his birthday. I would feel so bad, so guilty if that happened. I want a baby, but I guess I'm just nervous....nervous that the one month I do not want this to happen..that it's gonna happen...idk..I'm just a little stressed and out of it right now.