what is going on?! no period for 3months

Leanna • 20 in love with my boyfriend of 5yrs 💖😻 TTC FIRST BABY 👨‍👩‍👧

So I haven't had a period since April.. I took multiple test they all say negative been takeing one at least every two weeks still nothing even went to the emergency room two months ago for haveing an anxiety attack told doctor I think i might be pregnant thay gave me a test it was negitive I just wondering like what can it be???? 🤤