Am i pregnant????

Im on cycle day 44 and still havent had my period i did experience a little morning sickness a few days ago. Ive also notice more little white pimple like spots on my nipples umm.... My breasts really dont hurt my nipples kinda do ive taken 3 hpts and all have been negative idk what to think anymore i dont want to take anymore hpts and i havent called my doctor i did get an hsg done on the 7th last day of my preiod could that have cause me not to have my period if you guys could help me thanks