Hello and welcome to Healthcare Magic. Thanks for your query.
Your symptoms of flushing of the face and warm cheeks are more likely to be related to the side effects of Vyvanse. The facial flushing / warm cheeks are very unreliable signs to predict pregnancy
Flushing, increased sweating, headaches, palpitations, nausea, nervousness
/ anxiety, sleep disturbances, tremors, etc. are the common side effects of Vyvanse. If you have any serious side effects like muscle twitching, abnormal movements, dizziness
, agitation, prominent mood changes or hallucinations
, then you should report them to your doctor immediately.
Wish you all the best.