IBS-C AND IBS D???

ok over the week or so i found i was starting to experience IBS C (usually i alternate)I find it hard trying to strain to get anything out. I'm not passing gas either only when i'm in bed .....I was going but at times i wouldn't do anything or when i went it would be small amounts or loose.It came to a point where i was hardly going (if any)Thurs night after work i got home and went but it was only two small stools and friday morning before i went to the docs i went to the bathroom again and it was loose. She gave me a prescription for lactulose.I took one tablespoon and went to bed.I find i have been waking up alot during the night/morning the past couple days to try and go in making some relief.I went this morning and it was a small amount (loose)then i went again after i woke up the second time and it ran out of me like water.i have since been going back and forth to the bathroom most of the day. i feel gas all around the lower stomach and on both my right and left side.Sorry this is so lengthy but i thought maybe someone might be going through or have gone through the same thing.