13DPO - BFN: 18dpo and still no signs of AF

I haven't tested since 13dpo, I figured I was out with BFN that late. I am now 18dpo with no signs of AF. I do have symptoms but when ur TTC, who knows which symptoms are real lol. I'm super nervous to test. Anyone get BFN at 13dpo and end up with a BFP?! Symptoms? CM? Today I had like sticky/scant but in the last week or two I've had watery and semi eggqhite like CM on and off. Opinions?