This is weird (sorry it's long)

So yesterday night my stomach was causing me alot of pain. I knew I wasn't constipated because I had gone like 30 mins before it happened. While my stomach was hurting I started to get very cold and then the need to throw up so I ran to the toilet but all I did was gag once and nothing happened. After that I had decided to take a bath to warm myself up and relax hoping it would fix the problem. And while I was doing so I was texting my dad telling him what was going on cuz if it wasn't going to stop I was gonna have him take me to the hospital. (my husband was at work on night shift) but by that time I thought I was just sick. But when I got out of the tub and gotten dressed the pain was gone. ( my dad had told me that it sounded like I could be pregnant but I haven't heard anyone that I have known to be pregnant to go through pain like that... and I'm also on my period) but now today my stomach is extremely sore. It feels like I have been throwing up for the past two days. I have never experience any thing like this before its so weird. Have any of you gone through something like this?