TTC at 37

Felecia

So my fiance and I are trying to conceive while I'm 37 and he is 51. He has no children so I decided to get to give him at least one. I am 13 dpo at the moment and am having AF type of cramping. It's not really hurting but its uncomfortable. Symptoms leading up to this day have been excessive gas, nausea, weird headaches, and TMI but thin white milky like CM. I'm unsure what to think, I'm confused and too scared to take a test now. My cycle is due tomorrow and I'm a nervous wreck!!! Anyone else out there with good news of having some of the same symptoms listed above?