Is this serious??

Okay I'm gonna let y'all know that I am a big girl lol i weigh 248 lbs and its all due to the fact that I love eating. For the past year I think, things have changed. It started in February of last year where everytime I eat, I would feel immediately nauseous. I could not handle my food, and therefore sometimes i would throw it back up. I could literally eat an apple and I would feel sick or two small tacos or even some grapes. I would constantly have to take Pepto Bismol before i eat and after. In the morning, as soon as I wake up I would feel really sick and I cannot eat until maybe an hour later, depends how long i feel sick.

Could it be something serious? And is it time to speak to a doctor?

P.S.- i have not been able to actually speak to a doctor due to not having any health insurance until now.