Toilet Issues and lack of Appetite, Would be so greatful for some advice , i am worrying about serio

Hi , just wondered if anyone could possibly give me advice? 

​I'm 26 weeks pregnant

​For the last 8 weeks I have had lack of appetite compared to normal, Normally I love my food, but I cant stomach much at all, and when I do eat, can only manage a few mouthfuls. This is very unlike me ! 

​(This could well be pregnancy related) I am worried about this, as its so unlike me! 

​How ever I have noticed my stools  have got Dark patches in it, apologies I hate talking about this, but its causing me anxiety. 

​I wouldn't say its Black Tar, but Dark browny black patches, mixed with normal colour stools. 

​Now I have noticed this, I am linking it to the lack of appetite and thinking I have something serious going on, Colon cancer, or ulcers, stomach cancer maybe, 

​I do always think the absolute worst, but this is getting me down. 

​I will book in to see doctor to check if the dark bits are blood or not.

​Just wondered if anyone else has had anything similar? could it be stress/IBS 

Help xx 

Are you taking prenatal vitimins with extra iron? They can REALLY constipate you and make the stools dark. And upset your stomach. It's been 23 yrs. since my last pregnancy, but I remember losing my appetite for a lot of the foods/drinks that I normally loved. 

Also, eating a spinach salad can cause the dark patches in stools. I had that happen once and kind of freaked out. 

Could be pregnancy related. Hormonal fluctuations can worsen IBS.