I'm 3 weeks late.

So I'm 3 weeks late. I've went to my doctor it will be 9 days ago and they did draw blood but said the test came back negative. We have been TTC for the last 8 months I've been having weird emotions and moods and I called the doctor for another appointment but they told me to wait to see if I get my period... I am normally only 2 or 3 days late. I have been taking these vitamins my friend recommended while ttc it worked for her she said it might work for me I've taken them for 2 months now any idea of what else I should do?