My mind is like what the Hell!

So for the past two months I been going through so much stress, from new job, trying to loose weight, behind on bills, kids, and family. So I am now a week late on my period and still wondering what the hell. I had a pee test and negative. Now they want a blood test. The weird part is I wake up nauseous and part days too. I have discomfort in my lower part of my stomach and thinking maybe it’s my period and still nothing. I been extremely tired, very moody, and I feel emotional all the time.( even cry on a cartoon movie) So I been wondering is this normal. Am I crazy or all in my head. I need some comments, if anyone can give me please and thank you!