41 days and counting

it has been 41 days since i had my last pd… i tested and it was Negative… is there a possibility that i may be preg… or is something going wrong with my body. I went to the Dr but they said they could not do anything until i made an apt.(i did 25th of Jan) im so confused, if i was preg. shoulden’t i be able to tell by now if i am or not? maybe not knowing when i ovulate may add to the problem… thank you for reading this…