want to know if im pregnant

[weirdhumanbeing101]

hi, im 20. i had my period on 29th june. then i had anal sex without condom with my boyfriend on 8th july. he came inside my anus. immediately washed myself with water. also took an ipill within the next two hours. on 14th july there was slight blood. i continued bleeding for about 3 days. but it wasnt as much as a regular period. then on 23rd july we had protected normal sex. he didnt come inside me. but did not take an ipill this time. i went to a trip on 27th to 31st july to a hill station. my usual surrounding is humid and hot. during the trip i noticed i felt dizzy twice. also was a little constipated but that could be because we ate junk the whole time there. also, i always drink very little water. on 1st august i noticed a very light spotting. cant really makeout the color. also urinated a lot. im not more fatigued than usual. no headache or cramps. no vomiting. traveling through hillstation made me a little nauseatic, but it wasnt a lot. this one time i felt pukish during the trip but that was mostly because of bad oily food.
also im very irregular with periods. i had a 3 months gap once.
havent gotten my period yet. can you please tell me if im pregnant?
the sperm has to be injected into the fallopian tubes to be pregnant, right?