Hello Dear ,
Having such troublesome periods which is so painful and affects your bowel cycle also , you are probably suffering from Endometriosis.
You should do an ultrasound to evaluate for any obvious signs of endometriosis, though sometimes it can be silent on ultrasound.
Laparoscopy is the only confirmation of Endometriosis which gives an opportunity to " see and treat " any lesions that are seen to allow for best possible clearance of the disease so you get relief .
There are several options that you can avail for your pain, you do not need to suffer like this .
Take painkillers ( nsaid+ antispasmodic combo) in every period . There are other hormonal and non-hormonal options for you . They exist in many forms ... tablets like Dienogest , oral contraceptive pills or injections like Leuprolide etc and even newer formulations like Elagolix .
Science is progressing at a maddening pace , so please don't get left behind ! Take care of yourself
Next Steps
Consult with a gynaec to discuss the best treatment option for you .