hello mga sirs. kailangan ko po ng tulong.

Nagbabawas po ng tubig sa radiator, and nagooverflow ng tubig sa water reservoir. Tumataas yung temp ko ng 3/4. I hope hindi naman siguro ito Head gasket issue as we just used the car last weekend going to baguio and wala naman problems pag uphill and high RPMs. sa traffic lang talaga tumataas yung temp hangang 3/4. I recently replaced all the hoses, radiator flushed, and new radiator cap (0.9). My car is civic LXI 97

What could be the problem?

Thanks Tsikoteers!