That's about it really. Paracetamol will bring down a temp if you have one.
Over the counter cough meds etc are not suitable for pregnancy as they contain various things that you should not mix or take when PG.
I find hot water with honey and lemon to be good. Also a sniff of menthol crystals in the room to help clear my sinuses.
If its really bad then go see your GP, but tbh, most colds are not really able to be treated with prescriptions meds and just need to be toughed out, as crappy as we might feel.