7 dpo, could it be???

well i ovulated on the 17th i am uming, it was the last day i had ewcm, and so i took a test last night, just a tinkle and it was positive, with a first response (walgreens brand) so then i took a couple more, same, and then a digital this morning, which said pregnant. well this was my first round of clomid, isnt 7 dpo early to be testing!?!?!? i wasnt even expecting it, to tell you the truth we had just watched a movie onlifetime about tuplets LOL!!!! so i thought, hmmmm and boom positve. how early have you tested!!?!?! 7 dpo=twins???