Ok, I need some advise ladies!

I am very irregular with my menstrual cycles after becoming ill a few years and losing a lot of weight - I got my period last month and after talking with my husband we decided to try to conceive after this current months menstrual cycle - Well I was due for my period about 2 weeks ago but when I didn't get it we kept trying. I still haven't gotten it and the PT came back negative - Could it be possible to have conceived and it's still too early to tell? If I go the OBGYN will a blood test give positive results sooner? I have severe breast tenderness, not to disclose TMI but a white thick discharge - I am nauseous all day - I know that these all can also be symptoms of your period - I just wanted some female thoughts? Have any of you experienced this and it was positive?

Thank you so so so much -