Pregnancy possibility question...?

I had sex for about two weeks without any kind of protection. The last time was around the 16th or 17th. Im afraid I could possibly be pregnant. But Im I'n another state for 3 weeks so I have to way to go to the doctor and I don't know if it's too soon to take a at home pregnancy test. What are some signs that would show up this early even some that aren't the typical fatigue and frequent urination type things. When should I take a at home pregnancy test. I want to be able to know as soon as possible to be able to start getting care early. Any advice or info is really needed. Also I can't really go off of missed periods because I've only had 2 I'n the past year and a half due to depo provera shot. Last month I started around the 19th or 20th. But I haven't started yet. Thank you for any comments. Negative comments are not needed