late period but negative tests ?

So, today I’ve been late for 13 days, I’ve done quite a few tests, I’ve had about 3 negatives & 1 positive but with no control line, I’m having a lot of pregnancy symptoms & a lot of white discharge & feel the exact same as how I did when I was pregnant last time, but I’m not sure whether I am, it’s so stressful being late and then having negative results , if anyone else has had anything similar please can you let me know what I should do x