Both nipple discharge on periods. It?

Hello Doctor, I am 29 years, unmarried, sexually non active. I have PCOS, thyroid and having krimson 35 since last 2 years to get my periods. Presently I am on my periods and for the first time I am noticing some clear fluid is coming out out from both nipples while squeezing a little. I do not have any pain, lump, heavy mass, irritation, redness or reverse nipple symptoms yet. These discharge is happening from both the breasts and this is the third day of my period. Since last 2 weeks I am having some pain killers along with Gebapin NT due to spondylosis problem. I have some terrible pain on my neck and shoulder. The treatment is going on. So I would like to know if it is normal to experience this both nipples discharge on periods or there is anything serious about it ? Please let me know. Thanks.