Any possibility of being pregnant?

My period is never ever late, it's always right on time. I ovulated on January 14th and had unprotected sex that day.. My period was scheduled to come on January 28th.. It's February 4th and it still has not came. I was crampy in the beginning of the week, but I haven't been the past 2 days. I took 3 tests and all were negative. I've been a bit nauseous and I keep feeling like I'm going to be sick, but I haven't actually vomitted any yet. I know that they say stressing over it can cause you to think you're having symptoms, so I've been trying not to worry about it a lot. Any advice on whether or not to schedule a doctors appointment?

[Dr. Kokil Mathur]

Hi!
Since you have not got your periods, yes, please schedule an appointment. If urine pregnancy test is negative then go for a blood pregnancy test. A blood HCG estimation test would be more reliable. If the test is negative then you are not pregnant. If it is borderline, repeat after 48 hours to see if the levels are rising. Rising levels indicate pregnancy. If this too is negative then other causes of delayed or missed periods will have to be looked at such as ectopics (can give negative urine/HCG tests), stress whether emotional or physical, hypothyroidism, polycystic disease of the ovary, pituitary tumors secreting prolactin, anemia and poor diet, hormonal imbalance, unexplained or sudden weight gain or weight loss. You will need to consult a gynecologist for this.
Take care!

[heygirlheyy]

Thanks so much! I wasn't really under any stress until after my period was 4-5 days late, then I started to worry so I'm not sure if that has anything to do with it or not. I'm thinking it'll be best to schedule a doctors appointment. Thanks again!