Any advise or thoughts would be very helpful!

Ok here's my story.
My husband and I decided to start TTC in March.  I've been off the pill for a little over 2 months and had been on it for 5 months.  I've used several different forms of birth control (much stronger than the pill) consecutively for the last 7 years.
The first month off I had my period one day late from when I usually get it.  Everything was pretty normal the first month and I didn't feel any different. I did have some light pink discharge and a couple of drops of blood around ovulation time along with really sharpe pain on both sides of my pelvic region again during my expected ovulation time.
This month however has been very different. I felt pretty normal up until about a week before my period. My expected period was on Friday the 12th. On the Friday(5th) before I had light pink discharge and on Saturday(6th) I had a few drops of blood. I thought for sure I had implantation bleeding and got super excited! The Monday-Thursday leading up to my period I had some cramping that felt very similar to my period cramping. I thought this too could be related to implantation or it could be my impending period. I took a pregnancy test on Monday(7th) and Wednesday(9th).  They both came back negative so I thought my period would definitely start.  However I did not start but I was afraid of taking another test and getting disappointed so I tested again when I still had no period on Sunday (14th) Again the result was negative.  I still have not started my period so I took another test this morning Tuesday (16th).
The cramping I had leading up to my period has totally disappeared. I don't feel like I'm about to start at all. I also feel very tired and have some food adversions. I'm not sure if I'm imagining these things because I want to be pregnant or if they are real signs.
Is there any chance I'm pregnant or should I listen to those FOUR tests that say I'm not? Is it too early to tell? All the tests I take say they are strong enough to determine before  I even miss my period.
Sorry for the longs post but I'm really unsure with what's going on in my body and could use some advice from those who may have experienced something similar.