Ah. Your profile lists you at 18 and you're posting in a teenage pregnancy concerns forum. It's natural to assume one is underage. Please also know you can't ask any questions on conceiving, or how to conceive as they will also be removed. (This forum isn't intended for that purpose)
In regards to your question, all you can do is wait two weeks and test.
Well I will be 20 in April I'm 19 now
I know when im fertile and ovulation on my iPod it's a period tracker. And also yes I'm trying to have a baby and I fully aware of what it takes and responsiblity but all these smyptomns that I listed I never had before and out of all te times I had intercourse this one is so different and FYI I'm 20 yrs old
Symptoms are unreliable, so taking a pregnancy test at least 2 weeks after sex should give you an accurate result to know for sure. Are you on birth control? If not, I would look into it and see what can work well for you. Make an appointment with your gyno to discuss birth control options.
We can't tell you anything. All we can say is to take a test and go from there. How do you know when you were fertile? I'm assuming you're basing this on an online calculator since over 95% of teenage females are NOT charting, temping or tracking their ovulation dates and cycles. Many, MANY things can cause symptoms similar to what you have. I've had half of what you're experiencing, minus the weight and appetite gain and just found out I have digestive issues. You can't solely base pregnancy on them because they honestly mean nothing.
Are you trying to get pregnant? If not, (this isn't a "if it happens I'll be happy thing" because children are a very serious deal and require a proper job, housing, stable relationship--not a high school, puppy love relationship--and money situation) you shouldn't be having unprotected sex at any point.