pregnant & " virgin " ???

 hi yes hello so on friday my boyfriend and i were getting all freaky, we basically had dry sex and he fingered me and what not but he did not cum and i was supposed to start my period the next day and did not start till that monday which is abnormal for me and im scared its not my period and just implanation bleeding but it has been thick but its been three days and im barely bleeding and i barely have cramps which i usually have excruciating pain but anyways im just scared there couldve been some precum that couldve gotten in me but should i be freaking out and should i get a pregnancy test??? thank you for answers