husband is throwing up blood- drugs or cancer?

Don't judge I'm not in a state where I can read mean comments because this is so fucking hard already.
The last time my husband threw up blood he had stomach cancer. By that time he was clean since about 2 years. The doctors noticed that early and were able to remove the tumor at an early stage which was still a major thing tho because 1/5 of his stomach was removed. 
Just a few months after his recovery we've lost our daughter at 32 weeks and we literally went through hell I dont wanna describe it any further.
Last night I woke up because I've heard noises coming from the bathroom in the hall and I walked in to find my husband throwing up and I'm 100% sure there was blood. He reacted different then he did before he just closed the door in front of me and flushed the toilet, washed his mouth and went to bed. I was like paralyzed because I was SO shocked I didnt know what was going on. 
This morning he left before I woke up (I slept like 3 hours because I couldnt fall asleep after that) and I went through his stuff in his work room because I just had that bad feeling and he's always in there when he's emotional or down or something and I found tissues in there full of blood and a spoon that was lit on the outside and his lighters and I honestly was way too scared to keep on looking through his stuff.
I'm sure that spoon was used for drugs I don't know what to do I don't know if I should call him or wait for him and what to say and how to react because I think I'm right with all of that but I don't wanna be right with that and I'm so beyond scared something will happen to him.

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors