Menstrual like cramps when working out?

So today I was working out , before I was pumped and I wasn't sleepy. I'm currently going through a pregnancy scare.. Long story short. The guy had a vasectomy 10+ years ago (I've already posted this) and he pulled out but I'm still scared. Im irregular, and I estimated when my cycle is due. Which won't be until the 15th or 25th anywhere in between. I've been having cramps every now and then, more gassy then usual. Just like I would while I'm on my cycle. But usually I don't get cramps like this a week before I get it, it happens on the day of getting it. I'm just worried because I keep looking up symptoms. Like they say If you get random cramps but you're not bleeding or anything you could be pregnant. I read all these things. but.. I'm wondering Its IBS , or an ovarian cyst. IBS runs on my moms side of the family my mother has it the worst. Could it be that? When I exersised yesterday I didn't feel it. But I I'd a little when I worked out two days before. But today they're worse.. I'm scared... I don't know what to do. I keep feeling like my cycle is coming but it hasn't yet. I talked to a close friend of mine who said I'm not pregnant and I'll be fine. But I can't get my mind off it..
Menstrual like cramps when working out?
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