morning sickness / nausea

S
I'm almost 12 weeks, and I haven't been sick once yet. I have however have nausea on and off since about 7 weeks. Some days I don't get any at all and other days I feel so sick, all I can eat are cheese crackers (and it lasts for more than just the morning)... This morning, I felt the sickest I've felt yet! I was walking from my car to work at 6.50am and I gagged on the sidewalk 🤢🙈 
Just wondered, who's morning sickness got worst after 11/12 weeks and who's got better?