Hi. My menstruation starts January 2 and it last January 7. then I have intercouse January 11 and then January 15. At January 17 I have a light blood but it last only a hour. Can I get pregnant??

Yes of course you can. Did you? I don't know.

YES, sex causes pregnancy. Always use protection, while some days have lower chances, but it is possible

Can you get pregnant? That's a question only your doctor can answer. Are there reasons you think you can't get pregnant? Endometriosis? Cervical cancer? The loss of both ovaries? Tubal ligation and many more?

If you're a healthy female with no reproductive issues, any time you have sex, even if protection is used, pregnancy is a possibility.

So, based on your post, can you get pregnant? Yes! Are you pregnant? Well, that's a different question.

Wait for your next scheduled period. If you miss it, test at least a week after you miss it, using first morning urine. If that test is negative, wait another week, if your period still doesn't come, test again, again using first morning urine. If that test is negative, wait for your next period. If you miss it, either test again or see your doctor for a more accurate blood test.

But the answer to your question "can I get pregnant". Well, if you had sex, then yes, you can get pregnant.