I think b also but if you ovulated early a could be the daddy so I would on the safe side let them both know you are pg and take things from there. It doesn't matter if a came inside there is still pre stuff and it only takes one. Best wishes to you. Good luck.
In my opinion with low HCG levels you are very early pregnant so I would say man B. If you had a HCG blood test done then they should tell you how far along you are that would help you figure it out. Good Luck.
Man B is the only probability, especially as you had a period after having sex with Man A. Not to mention how low your HCG levels were. Not to mention that you got a positive OPK and had sex when you had a positive OPK. And not to mention that you didn't get a positive until about 2 weeks after estimated ovulation time.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. Med Help International, Inc. is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.