Hello, You have been a regular use of marijuana in the form of smoking. As you are in your second trimester and experiencing morning sickness, this is a common symptom associate with pregnancy. Marijuana has shown to be effective in reducing the nausea induced by cancer chemotherapy, stimulating appetite in AIDS patients and reducing intraocular pressure in people with glaucoma. It also reduces muscle spasticity in patients with neurological disorders. Doctors recommend medical marijuana for many conditions and diseases, nausea experienced as a result of chemotherapy, chronic pain, AIDS, Arthritis, cancer, multiple sclerosis, insomnia, ADHD, glaucoma, epilepsy, migraines in the states. It is also used to ease pain and improve the quality of life for people who are terminally ill. Since you are presently pregnant and have been using marijuana for relief from nausea, I would suggest you to discontinue the use of it to prevent any harm towards the pregnancy. Hope this helps. Thank you.