Preggo testing

Last period was last month in January problem being I have awful memory and don't remember when it came it was either the first or second week of January but still I had it and now I still have no had a period they always come on the 1st and January was my first weird month and last time my period was ever off I had my daughter my midwife told me not to make an appointment yet I have taken 4 tests and they were negative but I have a gut feeling I am pregnant and tomorrow I am supposed to get my period but have no signs that it is coming and now will 2 months with no period I took a test this morning curious when I should try again and when I should see my doc