Thanks for your query.
I have read your query & I understand your concerns.
Since you have delivered just 6 weeks ago and still breast feed your baby, you will be still in lactational amenorrhea
Hence chances of you becoming pregnant so soon are almost nil even after semen has gone in to vagina.
Hence I advice you to relax and dont worry about pregnancy
I hope I answered your query. I will be available for any followup queries you have.
IVF & Infertility