Hello dear Understand your concern. Yes it may be due to implantation bleeding or rough sex. Pregnancy should be confirmed 10 days after missed period by urinary UPT or by Blood HCG or USG Following are the other cause of your problem: Endometriosis Endometrial dyspalsia Cervical dysplasia Dysfunctional uterine bleeding Fibroids/Adenomyosis PCOS Hormonal imbalance. For exact diagnosis you should consult the gynecologist and require following investigation Hormonal analysis Pelvic examination USG endometrial biopsy Pap smear Ovarian follicle study Advice: Drink more fluid Eat healthy diet Limit caffeine, salt and nicotine Healthy lifestyle Stretching and regular exercise routines Yoga can be extremely helpful to reduce both the physical and mental symptoms Massage can also help both physical and emotional symptoms. also relieve depression, anxiety and panic attacks. warm water baths Sleep of at least 8 hours Keeping The Vagina Dry (Not wet, clean well) Wear pure cotton Loose underwear Best regards Dr. Sagar