Hi, so a couple weeks ago around (September 13) I went to the movies with a guy and gave him a handjob, he then ejaculated and it was not sticky but pretty liquidly, I whipped it on his pants, later when I went home about 2 hours later I touched myself. Now I have been feel small aches in my back, nausea, headaches, dizziness, and my stomach just feels weird. Is there anyway I could be pregnant? If not what could be wrong with me?