Re: could punch in the stomach cause cramps?
i am not a dr and have no clue bt am replying b/c you sound really worried. i DO not think a punch in the stomach can cause severe cramps monthly (i believe it hurt like a ***** though), and i seriously doubt it will impede your process of having kids. even if you passed out from this punch, it caused bad cramps for that cycle (which i believe could have done), i don't think you need to worry. i used to play rugby, and hat is a tough sport where getting hit in the stomach is common...some of the girls from my team have had kids (i have never tried).
it would have to be an EXTREMELY hard punch that could cause enough internal damage to your reproductive system. i have only heard of car accidents having enough force to do this.
the fact that you started having severe cramps is i think a coincidence. i didn't have cramps myself for a good 5 years and then got them. your stomach is cramping because the lining of the uterus is ripping off and expelling itself from your body. OUCH!!!
maybe look up some natural remedies on the net. ie/ camomile tea every day for a week before your period, evening primrose oil daily...i'm not sure on other remedies since i don't get stomach cramps but rather lower back pain.
anyway, i wouldn't worry i am sure you will have no problem not having kids due to this.