Let us begin by asking you to please stop worrying so much that it takes toll of your physical health. The fact remains that you need to approach a gynecologist to get yourself examined. When you go to him/her please do not tell that you have infection. Instead describe your symptoms and describe as to what happened to your husband after intercourse like he dad swelling, small abresions (Wounds/cuts) or any other difficulties.
Telling a doctor that you have infection can mislead him.
Coming bck to your description, the point that struck me was prolonged gap in intercouse. Such gaps can take away the desire to have sex and specially in you the fear that you might cause a infection in husband shall further prevevnt you from going into intercourse full heartedly.
This leads to dry vagina in sex and friction leads to injury
to foreskin of the penis and symptoms which one can easily describe as infection.
Therefore before going to a gynecologist take a trial of using lubricant s.a. Lubic Gel from Neon or other water based lubricant jelly at intercourse. See if your husband is still troubled.
Coming to the pregnancy
part .... how can you get pregnant with intercourse frequency of one at less than a month? As things improve between you two chances of pregnancy will improve.
Your menstrual flow variation fall within permissable / normal limits. Nothing alarming by the history. Watch for any bad smell (which you never had previously) in menstrual blood. It is sign of infection.
will prevent you from having good sex and good relationship between you to. Please be reassured once again that nothing very serious has happened. Visit gynecologist and come back to us. We are sure that you will be relieved of your anxiety
when we hear next from you.