Asked: could my girlfriend be pregnant ?

okay so me and my girlfriend had sex for the first time on may 5 I believe , she has been having allot of irregular periods , one time it was for like 2-3 months without a period . so we did it again later in may , then for the last time on June 15th , she got something that could be a period on the 18th of june .. she said she had cramps the night before and it came in the morning . It lasted 4 days .Now its the 19th of July and she is telling me that she went to a psychic friend and she says she could be pregnant .. Somehow.. NOTE: everytime we did it , it was with a condom.My girlfriend is very dramatic , this same situation happened like twice and each time she said she felt sick , felt weird . but it ended up being nothing… So IDK What to say or do .. its a really big responsibilty and I just need to know if it could be .