I did a first response preg test two days after missed period,it came out negative.had period feb 4th, sex feb 16, blood test feb 25,all neg.pregnant?

Preg not likely : Trying to conceive can be quite frustrating. Stay encouraged. Based on dates you provided, & the information on the preg test taken, it does not seem that you conceived this month. I suggest ovulation kits to use starting around 810 of your cycle. These can be purchased OTC. Remember, normally there is about a 20% chance of pregnancy per month. So, keep trying. If no preg after 1yr, you need eval