My problem : I eat healthy homemade food every...

My problem : I eat healthy homemade food every day, but for the past few days, I have been noticing that my digestion is not going right. I feel constipated badly, but when pooping I get loose motion or either my poop is very watery (sometimes it's normal). When I eat everything is fine but I feel a heavy pain in the abdomen area later. It's like I feel something is wrong with my intestinal area. Because I am not facing indigestion, but yes I am not able to pass out properly as usual. I get a bad feeling as if my intestine is blocked or something is stopping my poop to pass out. I even sometimes feel to vomit but I haven't got any vomiting yet. Yes, gastric problems I have but I took medicine to reduce that. So, for now, my gas problem is under control but again that abdominal pain is just too unbearable for me. :( Solutions I tried : I took a few medicines which I had at home which helped me to pass out during a constipated stomach before. Usually, it worked for me before but this time no. It didn't work. But the only solution that worked for me was when I ate prunes during nighttime (something high in fibre). I was able to pass out my poop by the next day. I feel relieved later. But this pain keeps occurring every other day. Help needed : I need suggestions to avoid this pain in future. What food do I need to take, and what exercises can reduce my pain? What checkups should I go through in case it is serious? If there's any permanent solution please let me know.