So confused!

I am now 18dpo I was supposed to have my period two weeks ago! I feel sick in the morning severely but no vomitting..severe heartburn and I integestion and a little fatigue at times also got up several times to pee last night....I took a hpt last Wednesday April 2 and it was bfn I am so discouraged but I still have no signs of af..I know this is tmi but my cm is very very heavy like keeps my under wear wet all the time and it looks sorta like egg whites or maybe school glue....I need some advice or possibly someone in my same shoes??