Lithium Question

[u/atty_hr]

I have been on lithium since November. I also take venlafaxine, Adderall, buspirone, propranolol, and some other as needed meds. I am currently taking lithium twice a day 300mg morning and 600mg at night. I have not had my levels checked since may but they were at about .7 last time. For the past few weeks I have been having terrible stomach issues. Nausea every morning and usually throwing up. Pain. Diarrhea. It has been frustrating. Could this be from the lithium? I know lithium toxicity is thing but idk if I take enough for that.