Too much stress at work haha

For the past two weeks I’ve been so stressed out at that almost every night me and my partner are having sex and then 5 days ago I was throwing up I’ve had the feeling of being sick a lot recently but nothing happens and also some severe abdo cramping which leaves me in tears but also I’ve taken three tests so far and all came back negatory 😭😭😭😭😢😢😢😢 and my af is due in less then a week can anyone give me any tips as to what might be going on with me