can i have early symptons within 1 day after sex ?

i had intercouse on the 13 of april the next day i started having cramps , headaches , dizzyness , started feeling tried like really tried , then a few day later i had the same symptoms , but i had heart burns with thoses symptoms everyday even morning sickness  . then here comes the 19 of april my cycle comes but i still have the same symptoms ' very very tried i couldnt even get up . and i have never been this sick before my period this is the first time ' and me an my boyfriend have been worried that i may be having early sympyoms of pregnany  ' we used the pull out method ; . he pulled out in time but i think there was alot of precum that may have contained sprem .. and i feel that im pregant is there a chance do i need to take a prenancy test ? or is it to early in time ? please i am very concered