Pregnant or just my cycle off BC?

Wasn't on for very long because I didn't like it. Had a 21 day pill pack and got my period 4-5 days later. After my period I had sex every second day for two weeks. When on the pills my cycle was usually 26 days and now I'm on cycle day 30. My left breast is tender and a little sensitive,my right is a little sensitive. No period yet and having cramps.. I don't even know if I'm late but I did get my period in April once I stopped!