I have been extremely depressed/stressed latley. I've taken 4 pregnancy tests and all have came up negative, including one at an Urgent Care center. I have pregnancy symptoms but also had a 4 day period on my regular dated menstrual cycle. My symptoms are nausea, tender breast, fatigue and sweetish foods. If I am, I would be about 4-5 weeks. Again I've been depressed and stressed and I work out regularly so I think that one of those things may be what's wrong. Any advise?