me and my boyfriend had sex for the first time about 3 weeks ago it was in a moment off sheer passion and protection was an after thought. also the weekend after (we don't get to see each other often but when we do we make the most of it)
both times he used the pulling out method. when i was talking to my friend, she told me i could get pregnant by pre cum i thought she had said it put a fright into me but after reading countless articles about possible chances of being pregnant from pre cum after a few minutes. i have decided to ask for others opinion as we were going for a while

ive had back ache recently and seem to get headaches practically everyday. i feel dizzy when standing up, all smells are really strong and seem to be peeing alot more than usual. and lately ive found that my appetite is huge which is very unusual of me. ive been pushing all of this aside until a family member mentioned that my constant heartburn could be a sign of pregnancy as my whole family suffered heartburn during their pregnancys and for a few of them it was what led them to finding out they were pregnant. my friend says its to early to do a home pregnancy test though

please help im so confused
could i be pregnant from pre cum ?
are they signs of pregnancy
and is my friend right is it to early ?

please someone reply to this im scared