Cramping and weird pain 7 weeks pregnant! please help!

Emma • 19 mo twin boys 💙💙 7mo baby boy🤰🏼 baby #4 is a GIRL 🎀 on the way!
I have literally searched high and low on the internet! Contacted my midwife! And I'm still not satisfied with the answers I'm receiving! Please tell me your opinion! 
So I'll try and keep it as short as possible. I'm almost 8 weeks pregnant with twins. And have been suffering from really bad ms. The only thing that has worked for me has been Zofran. But the problem with that is it's really sloweeeeed down my bowel movements! (Sorry)! I literally hadn't properly gone in 8 days!
I woke up yesterday with the worst cramps! I tried and tried to go to the bathroom but nothing! The cramps were so bad! Finally I went!! But all day yesterday I've had weird pains in my cervix (shooting pains), cramps on my left abdomen and in my groin! Wtf! 
Now today the groin pain is gone but I'm still feeling really crampy like when I walk around I feel like I can't stretch out my body properly! and I've still got some pain in cervix! 
I'm super worried! These are our rainbow babies after a miscarriage in February. Please tell me what you think and if you've experienced anything like this!