Can Coming Off The BC Pill Cause Lightheadedness And Nausea?

hi, i am almost 20 and i went off the pill (a month and 2 days ago). after using it for 1 1/2 years. i have been having alot of pregnancy symptoms, including fast strong hear beat, nausea, mild cramping, being light headed, breasts got bigger, nipples darker. etc. i doubt, but i was wondering if stopping the pills has caused all this? ive been off the pill before, i never had symptoms starting or stopping the pill. but i just need to make sure