Low blood pressure

Have any other ladies had problems with low blood pressure during pregnancy? My midwife didn't seem too worried but did point it out and said she needs to keep an eye on it. I constantly feel shocking, passing out daily, feeling sick, blurred vision and just generally feeling rubbish. I'm 25 weeks and just worried about the effect this will have on my little boy. Has anyone got any tips to help feel better? I'm drinking lots of water and eating enough. Any advise would be very welcome ☺️