Could I Be Pregnant?

I have been off of depo for about 7 months now and my cycle has been regular ever since... A few months after, my husband and I started trying to conceive. My last period was very light and after researching "Immplantaion Bleeding" I thought it could have been that because all of the symptoms I've been experiencing, have made me think I could be pregnant. I took 2 pregnancy test on Monday and both of them came back negative... I wanted some opinions on what might be going on with me. Could I still be pregnant or is it probably something else?