Am I pregnant under a lot of stress lately due to house move etc...?

Sorry should off added more details. My termination was as I said when I was younger and I seem to of forgotten what is was like! Im feeling sick alot Bad heartburn I hav e had a period but it was very lite. I did do a HPT but it was neg, that was about 3 weeks ago. I just seem to be alover the place at the moment. My Partner and I do have unprotected all the time as he had a vasectomy with his ex wife 5-6 yrs ago. I know its highly un likely but Im wodering if a bit of me wishes I was. I am 26 now. P.S thank you for your answers earlier xx