I've been done oral sex with 5 guys and have a canker sores in my mouth is it because of lack of sleep i've been sleepless lately or am i have hiv?

Mouth sores: Best to have that looked at by your doctor for diagnosis & further testing.

Sleep: It is not necessarily hiv. Get a specific test for that. The mouth sores are contagious. Get another hobby for awhile.

Sleep is irrelevant: Canker sores are the most common oral lesions. Individual ulcers typically last 1-2 weeks. The condition is idiopathic (cause is not known) recurrent aphthous ulcers is usually self-limiting. If concerned see your PCP after 10 days for evaluation and tests..