I'm so confused.

I'm 5dpo according to glow but I'm irregular. I had super heavy eggwhite CM on the days glow said I was most fertile. And it says my period is supposed to start tomorrow and most I've been is a few days off from glows predictions. I've been getting this weird mild almost burning sensation in my uterus, super grumpy, very sore breasts. I have been barely wanting to eat because I feel nauseous when I try. I've been craving salads and it's the only thing I can eat without wanting to barf. And one salad isn't filling me up so I end up eating like an apple and a pear on top of a huge salad. Bloated and gassy like mad and on and off heartburn even if I didn't eat. Only time I get heartburn is after eating spaghetti but I haven't. And also I had heartburn before a ectopic last year. With all this and if I O'd when glow predicted then what are my chances of being prego . And when should I test. I feel like I'm going crazy with over analyzing every symptom since last year. Thanks.