Pregnancy quesion

Jennifer • I am 34 yrs old. I have a 3 yr old son. Iam currently engaged to be married next yr. I just got off my birth control a lil over a month ago and we are hoping to have another little one running around
OK ladies in the past week my husband said I,look,like I have gained some weight n my breasts r getting bigger my Boss (who is a female) has noticed the breasts as well. I had my period I am in my ovulation window now .I was fine this am took an antibiotic that I was prescribed n I am on day 4 of it then like half hour later I ended up puking my fluid up that I was drinking. I have taken pregnancy tests n they have came back negative n I never get sick the last time I got sick due to the flu was over 7 yrs ago. Could it b a fluke that I got sick or could it b a combination