6-7 weeks pregnant: my body

im 20. my bfriend drew is 25. i just recently learned that im 6-7 weeks pregnant. a big surprise that i was not expecting. he accidentally came inside me on a nonsafe day for me, he couldn't pull out... i did take plan b, and soon after i missed my period, and tested positive on 2 pregnancy tests. evidently i became pregnant in my last cycle and did not know it. anyway... i have decided to have my baby. today at 6-7 weeks pregnant i got my first morning sickness, my boobs feel different, very tender, my nipples super sensitive. my body feels so different? im just wondering if these changes to my body are normal at only 6-7 weeks, or am i just imagining them? what should i be expecting soon? will morning sickness go away?