I am actually worried about my relative.So posted question for her sake.
Okay, I'm confused. Last year you said you'd been married for 5 months, and your profile says you're 26 years old.
It sounds like one of you is not completely clear of the trich parasite, and so after antibiotics it resurfaces, or he is cheating.
After you both take the 15 days of medication, are you both retested to make sure you're clear?
http://www.cdc.gov/std/trichomonas/stdfact-trichomoniasis.htm