What Causes Delayed Menstruation And Pain In Neck And Back?

hi my name is aisha,

tomorrow will be 7 days late weeks before i was having muscle pain from my neck to my back. headaches i have them some days worster then other days heart burn i get them every now and then.. but the muscle pain the only time i had that was with my second labor( but both of my pregnancy were very different) but after that stop the vomiting start and very thing that i eat and drink came up includin spirte... that was for two to three days i still get sick at the stomach with different smiles. when i press on the bottom of my stomach its hard, i'm also having dischargest which is a clearish white color and some days be very dizze i took and pregnancy test from family dollar and it came back negate so what should i do just wait because i know that i women body and they cycle changes but my have alreay change so now i'm not sure whats really going on..