advice re 7 wk old who suddenly seems frustrated with feeding

[TomThumbMum]

For the last three days my 7 wk old ds has been feeding happily for about 10mins but then he will start bobbing on and off my nipple frantically before crying. He doesn't appear able to latch back on but if I offer him the otherside he will take another 10min feed before the same thing happens. Normally he feeds on one side for 20-30 mins and then takes the other breast for up to 20 mins. For last 3 days I have had to change sides at least 5-6 times during feeds so he can feed until he seems satisfied. Is this ok, is it something i should be worried about? It only happens with his feeds between 10am and 10pm - I wondered if the heat could be affecting him? I'm happy to let him do this but wonder why he seems so frustrated all of a sudden. TIA

[thisisyesterday]

it's fine, he might just be getting frustrated as the flow slows and want another quick letdown, esp as like you say the weather has been so hot and he's prob thirstyh