The pill??

Got put on birth control about 3 months ago. Felt fine on it up until about 2 weeks ago. Started having migraines that nothing seemed to help with. My doctors told me to stop the pill all together to make sure it goes away. I stopped it when I started a new pack. Haven’t been on Birth control in over a week. Now I’m having nausea, tender breasts and on and off head aches. My question is could this just be from coming off the pill? During the inactive week before stopping my “period” was random spotting that lasted 3 days but was very very light. Also I’ve been hyper salivating for about a week.