one week late neg. pregnancy test

on november 29 of 2006 I had a medication abortion 28 days later I had my first period now 34 days later I still have not had my period I have takin about 3 or more pregnancy test one day befor I should have started, the day after I should have started and once again 3 days after that know it being monday jan. 29 I took one this morning and it is still neg. and im a week late. on jan. 21 I had some spotting when I wiped a very light pink and I have had unprotected sex all this month we are hoping next time it will be posative. I was raped in the local park with the last child and we were trying to get pregnant then as well but when i found out I was I didnt want to belive it.I also have a apt. this tusday to get a blood test done will this be able to tell me for sure or is it to early??