labor work and pregnancy

Im a house keeper i constanst of a lot of bending over and carring heavy object as well as a vaccum on my back.. Im starting to worry about this labor i clean 5 to 6 houses a day and ita killing me.. We even clean floors on our hands and knees.. Reach high for dusting and low... Is this okay? Im 14 weeks today. Everythibg is getting harder for me to do