Pregnancy test, am i going crazy?

Okay. So I took a pregnancy test 2 days ago, on day 31 of my cycle, said negative. And I took another one this morning. You couldn't really see the positive line, but at a certain angle I'm almost sure I saw a little shadow. Also in bright light straight on you can barely barely barely make out a faint little grey shadow. So. My boyfriend thinks I'm crazy. I'm stressing out. I'm on day 33 and have had a little cramping the day after we had rough sex hoping to make me start. My breast are a little swollen but not sore in the least, which I ALWAYS get swollen and sore so badly at least a week before I start. Nothing this time. I've had really bad mood swings sometimes. Idk what, if it's in my head and I'm not pregnant or if it's just too early to tell. What do you think? Either way I'll probably take another one in 2 days if I haven't started yet. Thank you! I just need opinions.