Feeling like I won't be a good mom

So I'm 14 and a half weeks. And iv wanted this baby for so long. But now some times I keep thinking how in the hell am I going to to this, to raise and be responsible for another human? And I keep thinking I won't be a good mom. Please don't get me wrong, I love this tiny baby so much already, me and my husband have wanted this for a long time. Maybe its just my hormones getting the best of me. Please give me some encouragement and tell me im not the only one that feels this way sometimes.