 [ Symptoms ] will breastfeeding affect levels of hcg and give a fasle negative pregnancy test  i am a nursing mother of a 15 month old my cycle is relatively normal  average 28 day cycle i am late and took a pregnancy test and it came back negative can the hormones related to lactation affect the hormones that detect pregnancy [ Disease ] yes you can but there are some things you need to know first first i will say it is called practicing safer sex when it comes to this disease i had been with a man with hep c and we had a very successful intimate relationship many years later and i do not have it unless you are in a monogamous relationship and you know without a doubt i suggest using condoms  male and female  be sure neither of you have overly rough sex because tears cause bleeding and that is how as you know hep c is transferred i would also state please stay away from anal sex as the tissues in and around the anus are more subject to tearing easier than oral and traditional intercourse if you are a woman do not at any length have sexual contact during your menses should you decide to have oral sex make sure your gums are not bleeding basically anything that can cause blood to be transferred to your partner during sex you do not want to participate in hope this helps