Should I go to my doc?

Me and hubby been trying for 3 months to have baby #2. Was on the pill for 15+ years. 1st born was a oops, but wouldn't change that fact. Every month seems more stressed as the next. Periods have been irregular since off the pill but before the pill they weren't regular either. 1st month 28 days late, 2nd month 1 wk late, this month 1 wk late. Symptoms: headaches, nausea really bad and starting with bad dizzy spells...kinda mimicking my 1st pregnancy....2 negative pg tests....not sure what to do.......