I can be pregnant???? help with best opnion?

Hi I have 18 years. My last period was 28 29 30 and 31 May. I had on 7 June was twice the bone and we will clean it again until he d both times out. June 18 we were together I was on top of the in me the first time the other times that followed were d outside bone withdrawal. I bathe all 3 minutes of the act. I can be pregnant? or do not care? Thanks for your answers! Venezuela'm sorry my English a little way!