Severe nausea

Im 6 weeks, 2 days pregnant and have had severe nausea for a week and 1/2 now. I’ve done everything from ginger ale, saltine crackers, putting fresh lemon in my water, sniffing it, ect. I’ve done everything. No it’s not my prenatal vitamins making me feel nauseous either. I don’t see my OB for 2 weeks and when asked to be seen sooner due to my really bad nausea they say no. Ladies what are some pregnancy safe medicine I can get from Walmart? I know I’m supposed to have my OB approve it but I need it now. I can’t go grocery shopping without feeling so sick, I can’t go anywhere, nor have I gone anywhere. I feel awful. So please tell me what are some safe nausea medications for me to take.