I've been boxing for the last 2 years and pretty much, whenever I spar intensely I end up getting sick, typically by round 2. At first, I thought it was a lack of conditioning but throughout the years my conditioning has improved yet I still get sick when sparring. I understand throwing up when working out intensely is common but I figured after a certain point it would go away.
Now I'm looking to compete in amateur matches but my coach refuses to put me in there if I'm going to throw up, the annoying part is a lot of the times it's not even from any type of body shot or tiredness, as I feel like I can keep going. I can just be boxing in the middle of a round during sparring , not get hit, and all of a sudden just feel extremely nauseous out of nowhere and end up getting sick.
I've visited a general doctor and she said it's either a) psychological or b) something going on with my gut and suggested I see a gastrologist? I've never experienced this in my life up to boxing and it's hurting my confidence. I just want to know if anyone else experienced this, especially those who competed and how can I get past this? I try working out harder, sparring harder, etc, and it just doesn't go away... Advice? Is this psychological? Appreciate the advice and sorry for long text.