My [24 F] boyfriend [37 M] was upset by how I reacted to the idea of possibly being pregnant.

Last week, I was feeling unexpectedly sick. Just woke up at 3 AM super nauseous, and vomited. Then kept vomiting well into the day. I couldn't keep food or water down, and I eventually realized I ought to go to urgent care because I was becoming dehydrated and lightheaded.
I called my boyfriend Harry, asking him if he could drive me to the clinic, because I thought it would be unsafe to drive myself, and he came to get me.
He asked what was wrong on the drive, and I said "I've got no idea, maybe a stomach bug, maybe I ate something funny?"
He said "Maybe morning sickness"
I joked "Oh god no, don't say that, you're going to make me sick again."
He asked if I was really going to be sick, and I said "No, it was a joke."
He started saying how it was a kinda immature joke, how ****ty it was that I'd react by saying "I'm gonna be sick" at the idea of pregnancy, etc.
I tried to explain myself, saying we hadn't been planning on pregnancy, and having an unexpected pregnancy would actually probably make me sick from stress
He said then that it would be funny if I was actually pregnant. I was just sitting there thinking WTF at this point.

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We got to the clinic, and the doctor gave me a pregnancy test just in case. I wasn't pregnant. I got an IV and some meds. I told Harry to go, I would be able to make my own way home on the bus after I'd gotten my fluids back up, and the nausea had subsided.
I'm super weirded out by how Harry acted in the car. I was being honest, a pregnancy at this point in my life would be devistating to my career goals, and financial and life goals, and he knows how important my career is to me.

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Tldr - My boyfriend acted really weird when I got sick and my symptoms resembled morning sickness.,


Source.