Weird period!?

Angel
I have always been regular! My period always starts on time last 3 days day 2 is always very heavy with awful cramps.... 
​We have been ttc for a few months now so every month I work my self up in hopes that every lil thing is pg signs..... so I'm trying not to do that but it's hard when my period was so weird! It was on time but very light I used 1 tampon day 1 and only half was covered after 4hr so I used pads the rest of the day. Day 2 was about like the morning of day 1 so I went ahead an used a tampon cuz I though it would get normal later it didn't it was the same as day 1 so I used a pad. By that night I had nothing! Day 3 nothing till about 6pm an it was just a few spots on my pad... Day clean all day day 5 a few spots around 1-2 then nothing. My boobs were a lil sore and didn't fill fuller like normal and I normally cramp really bad but this time it was very light like I'm being pinched....?  
​Could I be pg?