I stopped clomid and now I am late, can not taking clomid ma

I have had difficulty getting pregnant with my second child. I started seeing a specialist in August. I was put on clomid with IUI's. After five months nothing has happened, my clomid was increased and all tests were run. Both my husband and myself seem a ok to concieve. I decided to stop the clomid and try on my own for a few months. It is the first month and I am a day late (always had a 28 day clycle, late only once with my daughter) and the test was negative. Can not taking clomid this month make me late? What should I do?