Ok I was supposed to start my period on Oct 25th and since I didn't I took a pregnancy test and it came up negative so I waited another week and tested again and it still came out negative since then I have tested 3 more times and all negative. I really want a baby and I'm worried that the reason the test keep coming up negative is because it might be a ectopic pregnancy please someone give me some advice.

An ectopic pregnancy would still show up positive as you are still releasing the hcg hormone, the pregnancy is just outside of the uterus.
If your periods are usually regular, see what happens next month, you may just be having an off cycle. You could also check with your doctor; they may do a blood test for you.

Thank you so much for your answer.