My guppies 5 weeks pregnant but still not giving birth, she appears to almost about to burst and is energetic?

How could you possibly know when she received sperm? Guppys will drop every 28 days give or take about 4 hours. You will not get many babies with the other fish in the tank. Do not handle her now as it may hurt her. I can tell you the Barbs and the black skirt will eat them. The mixture of fish is not good. onesies of different species will not be particularly happy.