14 days late and 2 negative pregnancy tests, help?

[CourtneyJayne98]

I'm 14 days late and Iv took two tests both negative, Christmas time my boyfriend was on leave from the army up until the 8th January and we had intercourse mostly every day, but I came on my period the day after he went back to work, and then iv seen him once this month and that was 6 days ago and We had sex then and he came in me but my period still hasn't come on I don't know whether to go to the doctors to get a blood test or wait abit longer to take another pregnancy test, Iv been feeling a little sick and tired but then been getting up very early, also my boobs hurt abit when touched and today Iv had diarrhoea also Iv been gettin pains but they are on and off and not as harsh as my period pains normally are But also my boyfriends home and been ignoring me for 5 days cause we've argued but I was already late before that so I don't think it's stress, any advice? Please

[fem33]

take a blood test