I'm 24 years old and me and my partner of 8 years are trying for baby number 2. We have had unprotected sex the last few times we have had sex. I keep having signs like I had with my first pregnancy...really bad heart burn, food cravings, feeling sick, tired all the time, back ache, tummy ache and turned on lol. But I don't know weather it's just my body playing tricks with me. I done pregnancy tests and there negative. I'm really confussed.