Painfully tired

So my little one is 7 months and the sleep situation is just getting worse and worse. I'm trying to work 2 days a week as well and today I honestly fear I'm going to crash the car or collapse from exhaustion. I can't believe I actually miss the newborn days of being up every 2 hours for milk. Now he's up every half hour to an hour or more all night, or moaning constantly in his cot trying to crawl or roll. If he just wanted milk that's fine but sometimes he doesn't go back to sleep especially if I've had to change his nappy. I'm at my wit's end and feeling really deathly now 😭. Is it wrong to give him Calpol before bed just to get some sleep!?

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