Devilseye said:
Combining them is fine, and in fact they work well together. When it comes to GLP1, sema is 20 times more potent than reta. That may partly explain why reta doesn't have much of a reputation for hunger control (tirz is generally seen as better for that). What sets reta apart is its strong binding at GCGR and GIP. On top of that, your reta dose is sub therapeutic, which doesn't do you any favors either.
So pairing the two isn't a bad approach, since they complement each other. Still, try raising your reta dose before anything else.