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The symptoms (sharp pelvic pain, pain resembling contractions, burning & irritation in vagina during and after intercourse, bleeding after intercourse) could be suggestive of possible endometriosis, adenomyosis, pelvic adhesions, vaginal infections, semen allergy, PID etc. The symptoms (weakness, headaches, lightheadedness, dizziness, increased tiredness, increased sleep) could be suggestive of possibility of pregnancy. Visit your doctor/gynecologist for thorough evaluation to look for the underlying cause. Get started on treatment as indicated by your examination findings/investigation results to help you control your symptoms. If pregnancy is suspected, look out for development of any new symptoms suggestive of pregnancy and consider visiting your gynecologist at the earliest for thorough examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet.
Take care.