Asking for a friend

My friend is so confused. Because she had her tubes tied due to complications with my previous 2 pregnancies and reccurent female infections. And her youngest is 2. And now a week late on her period. And she's been spotting light pink blood on and off for past few days. And she's so naseous most of the time and often will get sick. I am having the most intense cramps in my lower stomach. She took 2 pregnancy test and they came back negative. She needs to make an appointment with her obgyn on Monday but she just wanted to see what you all may think and see if anyone else had experienced anything like this. I was tested for UTI last week and it came back negative.