Missed period.

Mystery
Okay so i had a yeast infection about 2 or 3 weeks ago and them a week after i had this really bad cold i felt sick and now I've missed my Af and my boobs have a tingling itch sensation ever time I go to sleep and wake up I feel sick and bloated, I took a 89cent hcg pregnancy test after i was 4 days late my AF, it was negative I still haven't got my AF, and haven't tested again yet.