The bleeding will carry on for a few weeks. It will gradually turn a brownish colour and decrease until it finally stops. If you're losing blood in large clots.
Focus on eating plenty of fruit, protein and carbohydrates. The fruit will supply antioxidants to aid the immune system, the protein will help repair muscle.
So, in general, it might make sense to wait at least six months to a year, but it really depends on your emotional readiness. Focus on self-care and rebuilding.
You can shower a few hours sooner if the spray tan doesn't contain bronzer. If you can go longer than eight to 10 hours, you may have even better results.
Try foods such as bananas, rice, applesauce, dry toast, soda crackers (these foods are called BRAT diet). For 24-48 hours after the last episode of vomiting.