I don’t know what to believe, help?

So my boyfriend and I have been together for months. I’ve never had any vagina issues or anything wrong with my body. I got to the doctor every month for a check up and I’m never told I have anything. So my boyfriend wanted to have sex a week ago on Saturday but I got really sick. Whenever I wouldn’t have sex with him he would get mad and say things like he’ll cheat or he wants to have intercourse with someone else. So he stopped talking to me for most of this week and Tuesday he told me he had an std and was taking medicine for it. When I freaked out he told me that it was just a joke. He texted me today and tells me he actually has it and I should get tested/
I don’t know what to believe, help?
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