What is wrong with me?? Anyone else?

So this is a little embarrassing but after orgasming I got really bad pains in my lower stomach really hurt and so I went to the toilet and I was so dizzy and started to sweat a lot!! I felt like I was going to throw up and faint so I lay on my bed and after a few minutes I felt better but I thought I was going to pass out..

I do have IBS which are some of those symptoms but normally after eating it happens but these pains and symptoms happened straight after climaxing..

Me and partner are TTC and googling symptoms on just makes anyone panic.. I’m meant to be taking a pregnancy test tomo anyway but now I’m worried..