should i be worried

Keidra

I'm six week almost and I haven't had any symptoms I went to the doctors and got checked out and I'm very much pregnant but nothing. Then today I had light spotting and really bad cramps the doctor says it's dehydration , stress and lack of sleep. but I'm scared this is a bad sign. I have two kids and Everytime I felt everything idk should I be worried? has anyone else delt with this?? I'm worried please help